1 Tivo
1 Showstopper
I started off as a TiVo user, but when my 2 year old TiVo died, I couldn't stand watching TV without the ability to pause, etc. I always wanted to see what Replay was like, and happend to find a pristine open box at my local Circuit City. After using both for sometime now, I can say that I prefer the TiVo over the SS. Actually, the only thing about the SS I like is the Channel Guide method for recording.
My favorite feature of the TiVo is the Season Pass Manager. If I had that on my SS, I wouldn't have missed this past episode of Enterprise. (Damn FOX and That's 70's Show)