I bought a Plextor Px TV402u based on your review from Scan.

On arrival I was very impressed with the build quality. However after installing the latest driver the software crashed with an error messsage "Windvr Mfc has encoutered a problem". I replaced the hard drive with another and installed XP, the sound driver and video driver only. I installed the software and driver again and the unit still didn't work. After tuning the unit it would only run for two minutes.

I downloaded Sage TV and the unit would now record for several minutes and the quality was excellent. However the Plextor had the habit of uninstalling itself on a random basis! I emailed Plextor but had no reply (at the time of writing). Scan replaced the unit, but it was just as bad, and has now been returned. Both units were built in Dec 2004 and had very similar serial numbers, so may be it was a bad batch. 

I am now going to use a Win PVR350. It's a shame about the Plextor, but if I hadn't had the  problems I'd never have found out about Scan's first-rate aftersales service. Finding a silver lining can be time consuming!

David Kanefsky