As a beginner to calligraphy and fountain pens, this was such a treat to have to test out all my ink samples. The pen holds a TON of ink and is easy to fill from both bottled inks (I tried Ferris wheel press ink) and the goulet test tubes the samples come in. It did take me a minute to get the ink to flow out on my first try but I think thay was simple user error and I haven't had any issues since. 10/10 would recommend!

I was going to order this from Amazon, but I thought of Goulet Pen Co., and I decided to support them instead of Amazon. I'm glad I did because they are and great to deal with! The pen is excellent (as I knew it would be). The piston filler holds tons of ink, and it won't dry up (I know this because I already have a TWSBI Eco, and it still has ink in it from 2 years ago, and it writes like a charm. I am a calligrapher, so I purchase fountain pens primarily as tools. My TWSBI Ecos sport XF nibs, and they are very nice. Smooth writers, and fairly wet for an XF nib (which I love). I heartily recommend this pen, and even more so I recommend Goulet Pen Co.

Easy to begin using. Very simple to put in ink. So glad I chose the extra fine nib. Not at all too thin. If you've been thinking about getting an extra fine nib just do it! This pen is just what I needed. It is a tad bit long when posted but doesn't bother me. Can certainly use unposted and that's fine too. Like the white as it goes nicely with any ink. Highly recommend this pen.

Love this pen. I have 3 in different colors. Smooth ink flow

Love it. I’m using it with some heavy shimmer ink, and it’s working great. I did have to floss the nib a bit to make it flow the way I wanted (it kept clogging a lot at first), and I hit it with the mesh to take down a little bit of the feedback (the tines were set amazingly, it just had some feedback that was a touch too much for my taste) and now it’s working like a dream.

3rd TWISBI still love everything about them. 2nd ECO so going for a different nib. I can see myself collecting as many as they release.

I find it difficult to add ink because the twist piston method is hard to turn. Even with the silicone grease it does not twist easily

Love this pen - so smooth to write with

Stunning pen. I love the inking mechanism. So unique and makee refilling your pen 100 times easier! Im a big time journaler and writer so this pen is amazing for long hours (edpecially since the pen holds so much ink) I prefer F nib in TWSB but the EF is good for signatures!

Smooth!

I am annoyed with how much money I needed to spend to realize I don’t like a medium nib pen. My assumption was that medium would be a default option. I feel like I did adequate research, but now that I have the pen in hand, the writing is so thick that it looks bad in my notebooks and journals. Word to anyone wondering what size to get on their first fountain pen, NOT medium, F or XF I guess. Maybe this is a struggle for everyone when they first buy pens, but I was hoping to have a one and done, and it appears to not be the case.

Great
Pen great service!

I'm an artist who was looking for the ideal fountain pen to use for sketching. I purchased a number of different brands, but the TWSBI ECO felt and performed much better than the all the others. The one I have is a medium nib, and once I experienced it I just had to order an extra fine. Now I have the perfect set for my sketch crawls.

I love this pen! Prompt shipping and all as expected.

I like a lot about what this pen has to offer. Good size grip section for my hand, big ink capacity, easy maintenance. But I’ll most definitely be returning to my lamy safari soon, because this pen just gushes ink! I can’t use this pen on basically any but the most expensive papers I have with the most well behaved inks I possess, otherwise it just shows and sometimes bleeds right through and it looks horrible. Feathering is a constant, even with my best efforts it’s still there at least a little at all times. I just wish the nib was ACTUALLY extra fine!

Loved the gift and put it straight to use. Looks like it was a winner all around!

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Firstly, my experience with Goulet Pens has been excellent. They have been helpful answering questions to help with my indecision, and frankly naive understanding of the fountain pen world. The two orders that I placed in the last month have been packaged with care and sent quickly. Now, on to my new pens... It started with my needing to find a pen to get as a gift for a colleague who is moving out of town. After searching, reading, and watching videos, I settled on the TWSBI Eco for the reason that it seemed perfect for a person who loves design and loves tinkering. I ended up ordering three. One to give as a gift and two for myself. That seems totally selfish but I couldn't decide on a color, and honestly, it hasn't been the best year and I felt like a deserved a little treat! The pens have arrived and are excellent. I selected the black-capped pen for my colleague (and purchased a couple of bottles of ink to go with his gift), and then got to inking up my new pens. After following the instructions, and getting them inked, they have proven themselves to be worth the hype. They are gorgeous and they write exceptionally smooth. I ordered medium nibs, as it is my preference as a lefty.

Writes above its weight!

Forever a fan of the TWSBI eco. I love the various color options along with a quality instrument. This pen is easy to disassemble for cleaning as well as ease of use for refilling ink. nib seems to be a bit scratchy, but the pen stroke is great. Purchasefor similar pen stroke but smoother writing experience.

I love the look and feel of this pen. I got the EF nib and it writes a bit like my best mechanical pencil with slight feedback but smooth. The ink is beautiful sloshing in the demonstrator!

I love these pens!

I bought the TWSBI Eco on a whim. Could the TWSBI Eco perform as promised? The one I purchased has a white cap and is filled with Diamine Chocolate Brown purchased as a sample from Goulet Pens No broken promises here. The TWSBI Eco is ready to perform, gliding over the page with smooth strokes each time I put pen to paper, no priming, no .skipping or hesitance. A great purchase from a company here to stay.

I spent two weeks buying and tinkering with fountain pens. Ultimately, the TWSBI outperformed the Visconti Homo Sapiens and Pilot 823. Don't bother buying anything more expensive. TWSBI does a better job writing.

I'm a fan of the Eco. I initially got the EF nib (hearing that they run wet), but actually found it to be just a bit too dry (especially with some of my inks that seem a little thicker). I had a F nib from another Eco (which had unfortunately met its demise in a parking lot) and swapped them out - perfect!

The pen arrived on time. It was easy to ink up and it writes perfectly and without fail. I love the 'demonstrator' look and being able to always see my ink levels. The amount of ink it holds is incredible and I never have to worry about it not performing. It always just works which is my favorite part.

This is my third TWSBI and my second Eco. It and three others are part of my EDC urban sketching kit. I like that I have the option to post or not. And it holds a huge amount of ink, which is visible. It has a EF nib which is the perfect size for cross hatching.

I'm not a huge fan of demonstrator pens but this one was beautiful. I got a fine nib due to reviews that stated that the pen tended to flow wet, but the ink flow is a bit low for my standards, but I can fix this by flooding the feed. The nib writes very smoothly, however. As for posting, the cap posts fine for my hands, but users with larger hands may find the cap has trouble staying posted. The only thing to be seen is if the pen will crack, as TWSBI pens are wont to do.

Discovered Goulet several months ago and among the numerous items purchased are six TWSBI ECO pens. Enough said about my feeling on this product.

I really do love this pen, and will probably buy more colors.