Just wanted to pipe in here with my 2 Cents!
I have had Tivo for about a year now, I love it. And last week I had a DVR put into my second room - and I'm not loving it so much, but I'm trying to be patient and see if it grows on me. Here are the two major differences I have found:
1. Tivo lets me actually watch 2 shows, sort of simultaneously. Let me explain. You have two tuners, so you can toggle back and forth between the 2 shows that are on. I.E. on Sunday I was watching the Amazing Race on one channel, and I set the other to the Oscars. With Tivo, you have 30 minutes of memory on the tuners you are watching. (Without setting it to record, it just does this.) So, after I was done watching the Amazing Race, I switched over to the Oscars and hit the little button that takes me to the beginning or end of the current show, and watched my program. No recording necessary. I must say that on Thursdays, this feature allows me to watch 4 shows per night instead of 2. (But some people find it a bit crazy to watch TV this way - my DH can't stand the way I flip back and forth!!) BUT - my new DVR doesn't have the same feature. I can record one show and watch another one, but I don't have the capability to see two back and forth. I have to record one and then pick my other channel to watch. DRIVES ME NUTS!!
2. The DVR remote doesn't react nearly as fast as the TIVO one. SO when you are watching something you've recorded, and are FF through the commercials, you shoot way past the restart and have to then REWIND - I find this very annoying.
Just FYI, I am a Directv customer, and got both systems through them. The TIVO was what they offered last year - not sure why they don't still have it. BUT, I got my DVR for free (except $19.99 shipping/handling, and free installation.) Normally, costs $99.99, which is what I paid for the Tivo. I also pay a $4.99 fee per unit each month to Directv.
Hope this helps, and you don't all think I'm completely nuts for my TV watching!!
Tricia