The Lamy Balloon Roller is one of those pens that I am desperate to love, but has one little thing that keeps it from being perfect. And by perfect I mean I REALLY like this pen, and despite the fact it is 0.7mm, I use it a lot. From me, that is high praise. But, in the initial review I talked about the ink cartridge skipping, and that has never gone away, even after repeated use.
I took a full 8 1/2" x 11" page of notes with this pen last week, and counted six obvious skips on the page. By skipping, I mean the ink line thins out for a partial or full letter, but no more that that. Six times over a full page is not a large number, but it is noticeable to a pen addict like me.