TWSBI 三文堂 钢笔Diamond 580透明本色活塞上墨式钢笔 F尖
I can't be bothered, so I just write with the cap off.
The design would be better if the cap attached farther down the pen like the Lamy 2000 -- that pen has a piston as well, but the cap grips below the actual piston component when you attach it.
You still write in longhand.
You've tried and enjoyed fountain pens.
You're willing to spend money for a pen that you will use, daily, for a year.
You're willing to buy a pen with tools, an instruction manual, and videos that you will might to review.
Then this pen is a superb choice.
Unlike ball-point pens, fountain pens have a 'best angle' at which to write. For me, the TWSBI's angle is perfect. It only requires a light touch of the nib against the paper, it holds enough ink to not need refilling for a month, and it's a solid weight against my hand.
But I despair when I pass it to people who haven't been introduced to fountain pens.
When I had a problem with the pen, the folk of TWSBI sent me replacement parts for free.
I highly recommend the pen, but only to the small subset of people who use good fountain pens daily.
Additional information: 2 October 2014
I've used this pen for about a year. The cap has now separated into two parts: the metal that screws to the pen, and the clear plastic top that covers the nib.
Although TWSBI would eagerly replace the top, this is the second problem I've had with this pen. I'm now looking for a pen that doesn't break so easily.
Thanks for a year of good writing, TWSBI.
Prior to filling it with ink I flushed the pen with a dish washing liquid water mixture. I flushed it twice to make sure that any left over oils from manufacturing were taken away.
Filled it with Noodler's Red Black and the pen wrote on the first try, no need to prime, no skipping, no globs while writing.
The weight of the pen and balance of it is good for me when filled, I have medium sized hands so your mileage may vary. Also I do not post this pen (put the cap on the end of the pen). Because the end cap controls the piston I do not want to inadvertently cause the piston to move because I move the cap with my hand.
One thing to remember, you will likely not fill the penn completely on the first try. I had to fill it, flip the pen to the nib was pointing up, push the piston up so the air escaped, and then fill again.
i still haven't used up the first fill of ink (noodler black, which is waterproof) either. i would imagine that single $12 container of ink will last me the life of the pen. (things tend to disappear from my office... dang thieves)
oh and i read a review where someone said the cap doesn't stay on the top while writing, and that is somewhat true especially if you write with a flourish. not a huge deal, as the cap on top makes the pen pretty heavy and unbalanced when writing (just put the cap in your pocket or off to the side).