I've been using TiVo since it arrived in the UK until I cancelled my virgin media contact a few days ago.
Decided to buy a FVT 4000 since it was the only other PVR on the market with 3 high definition tuners.
Here's my 2 cents on the 4000 much as comparison with TiVo
+++++ pleasantly surprised with picture quality and no artifacts (my wife thinks it looks better)
+++ very happy with recordings and so far and despite that I record the world I've had no clashes
- - no trash bin when I delete stuff by accident (twice already)
- menu text/guide is faaaaaaaaaar too large fit most large screen tv's
+ genre button is great... -but only find few hours result (it should search the whole guide/whole week) -and if you check the detail of any programme you have to start over
-it defaults to selecting the most recent episodes recorded when most people watch oldest episodes first
- there is a bug preventing you from selecting many episodes to delete off those episodes scroll of screen.This is exacerbated by the fact that it selected the newest episode by default when it's the oldest episodes that are more likely to be deleted
WISHLIST
When you interrupt a playback recording to watch live TV the back button should take you directly bible to the recording to continue (As per TiVo)
When a menu is activated the background should be more opaque so you can still watch see/it comfortably (currently so dark there's no point seeing it at all and it might as well be black)
Remote is already programmed with your TV for on off and av do it should simply operate the actual tv volume instead of adding a pseudo volume
List view needs to show more than just date it was recorded . It could at least indicate which episodes are part watched or unwatched (Bolden unwatched like emails maybe?)