Zowies current gen mice (Huanos + black shell + white logos/wheel) still have scroll wheel problems.Some more some less.
I had white FK1, ZA11, ZA12 and had to sent them all back, because they all were skipping scrolls (mostly while scrolling up) and were therefore unreliable for any serious MP gaming. :/
Currently I'm on a "yellow" FK1. It skips scrolls as well, but not as often as the white ones.
Other than the scrollwheel, i find Zowie FK1 to be perfect: Light not braided cable, clicky and responsive Huanos + great sensor and shape.
(Well there is button latency, and you have to use included mouse feet on top of the glued ones, so it wont bellyglide on your pad, but it's still better than most of other mice out there.)
I really don't get it, why Zowie can't manage to fix the wheel for so long. Its not exactly rocket science....