I own a Kyro and I have previously had these cards:
Voodoo1
Voodoo2
Voodoo2 SLI
Geforce DDR
Voodoo5 5500
TNT2
and I can certainly say the drivers are great, I've had no more problems with the Kyro then with any of those other cards, the error the guy in the review got is already fixed in the driver he atually has, he just needs to enable the option that fixes the problem, AFAIK the drivers for the Kyro II are just the Kyro I drivers changed slighly for the Kyro II, after all the Kyro II is just a Kyro on a 0.18m process with a higher clock speed so there's no need for totally new driver, the last Kyro driver release actually got released accidentally with Kyro II entries in it so it looks like there using a unified driver for all Kyro products.