Redz and Dye covers, a sweatsock, large latex condems (unlubricated, but ribbed for grip).
TIppmann 98 (Every accessory I can think of)
custom assembled Autococker
It has a sticky pad at the back, fits many tank sizes, available in quiet colors. Not too flashy.
It has loose threads, it can spin on the bottle a bit. Very overpriced (like most bottle covers)
All in all, it was the best one for my tastes at the time, though now I'd buy a Dye tank cover. The Rase is definately better than the Redz one.
I'd never play without a tank cover on my air tank, that's just too much risk to take scratching it. The rase ones are pretty nice, although overpriced. The Dye ones are excessively nice (like so many other luxury paintball goods) but I'd say the Dye ones are easily better if they fit your tank.
I give it an 8 for being decent quality but nothing special, poor value (but not poorer than others), being available in non-flashy designs, and doing its job.