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It's certainly not bug-free, but bugs will be fixed and the list of advantages will only grow as time goes on.
For what it's worth this should be fixed in the latest revision. For future reference, bugs are likely to get fixed much more rapidly if you use the bug tracker. The forum is really meant for discussion only.
[quote name='"fs"]btw' date=' I get choppy video whatever the nice value for some reason and mouse sensisitivity seems way up whatever the setting and I usually want it slow. in addition, sound quality is degraded.[/quote']
Can you elaborate on "choppy video"? This isn't something anybody else has reported. In which revision do you first see it?
The mouse input in the closed source linux version employs a hack in order to bring the sensitivity value into a range that is similar to the Windows client. Unfortunately this also introduces a small amount of mouse acceleration for low speed mouse movements. This hack has been removed in ioq3 and replaced with a more legitimate fix that brings its input in line with the Windows version. If you don't like it, you can try playing with cl_mouseaccel and sensitivity.
Sound quality should not really be any better or worse, but it will certainly seem a little "different". With OpenAL, Q3 is no longer responsible for any of the actual sound mixing, so if you're having problems, blame your installed OpenAL library. OpenAL gets you position audio (i.e. > 2 speakers) and realistic doppler effects for free. If you don't like the OpenAL sound, it can be disabled with s_useOpenAL 0.
WRT cheating, I think the prevalance of cheats is rather overestimated in general, but that's just an opinion. Nobody can really know. The existence of PB gives people a (false) sense of security that cheating is not possible, so there is less suspicion and witch hunting.