My second fountain pen was a Kuratake 13, and I love it! I've been using it daily for more than a year and had no problems with it at all. I've used it with Diamine Ancient Copper, Robert Oster Deep Purple, and Organics Studio Santiago's Sea. The only thing to be careful of is that it will get your fingers inky for the first week or so after a refill. The breather holes are above the brush and they seep for the first seven to ten days.
I have had mine (Kuretake No. 13) for over a year and it never dripped on me. The more I write the shorter the brush becomes and the tip loses its point a bit. However I can still get hairlines and when I don't it's usually a skill issue. After a year of daily writing the tip does split sometimes. You just have to reset its shape once in a while on the edge of your paper or on scrap paper.
I've only ever tried ink in one of the transparent water tank ones, which works, but the plastic stains a lot. I'd rather have a cartridge one for ink, but never saw them for sale... until now :)