OMEGA drivers?

Hi!
I've just recently heard of these so called "Omega" drivers (
http://www.omegadrivers.net/ ), which are avaiable both for ATI and nVidia
cards.
I'm aware that these drivers are one of those unnoficial drivers, tweaked
for performance boost.

I was wondering if anyone around here actually did install these drivers
(latest Win2k/XP version 1.5672) and how you are experiencing them? Any
performance boost? Any flaws/bugs? How's the overall stability? Above all -
is it worth having these installed instead of the official ones.

Speaking of the drivers, which official version of the drivers is most
suitable today for games?
At the moment, I'm using version 53.03 with my MSI Geforce5900SPVTD.

Thanks in advance!
MheAd\
Stockholm, Sweden