I ordered this pen with an extra fine nib. It has a large ink capacity, which makes it last between rrefills. I used a blunt fill syringe to refill the standard cartridge, but there was also the option of the piston or spring fill. This pen served my everyday needs for two months without issue.
My main problem is that after two months the cap started chipping at one of the stress points near the clip. I didn't even use that clip much, but I am pretty rough on my everyday carries as they do get dropped frequently. The chip gradually became bigger and the red 'button' at the end of the cap fell out. The cap still technically works and keeps the nib safe, but it is disappointing that this happened.
This TWSBI Swipe will probably end up being a spare nib for my ECO as I hear the nibs are compatible.