<< After trying on 5 different PCs, there is infinitesimal or no difference in DVD quality ON A MONITOR between hardware or software decoders. If you have a slow CPU, 350 and less, then you might notice 'speed' using hardware decoders. >>
I think that's pretty fair. I've tried WinDVD 2000 2.3 w/ Radeon and PowerDVD 3.0 and the H+ and I think on a monitor they are pretty similar in Video quality. I like the H+ for being able to output dolby digital/dts stream through an SPDIF port, in win2000 using your soundcards doesn't work 🙁 And the TV-out quality is definately better on the H+. All in all I like having the H+ better. the only thing that kind of annoys me is no right click menu, because I'm used to it from WinDVD.
I only use my monitor in 800x600 so the quality issue isn't really noticeable to me. Plus I only have a Voodoo3 and they aren't that great for DVD quality.
If
[*]you have a video card with good DVD playback quality
[*]your video card has TV-out (even still it probably won't be as good as the H+ but you might not care)
[*]your soundcard has SPDIF output
[*]you don't use Win2k
then a hardware DVD decoder is probably unneccessary. However if you don't meet all these then a hardware decoder has something to add and they are cheap enough to make it worth it in my view.