I've still got the drivers on my machine, and I haven't seen a bad timeline yet. I have done what Capone suggested and recorded anything and everything, back to back, channel change, while using the machine for other stuff... all in an attempt to stress test them. Seemed to pass okay.
As far as quality goes, I think they are as good as any drivers I have tried and - bonus - I haven't had to mess around with ProcAmp / Tweak_Tool / Reg settings like I've had to in the past.
So, fingers crossed.
And as sub says.... don't forget to reboot like I did
Celeron D 2.53GHz, 1024MB
120GB, 160GB int, 80GB, 250GB ext, 40GB lan HDDs
PVR-150 retail, 1 wired MVP, 1 wireless MVP, OFA URC-8910 Remote
Look for me on XBox Live!