Originally posted by Eagler 

once you get it, you'll wonder how you lived without it 
 
 YUP it makes all the difference.
For example I Tivoed the season finale of 24.  A 2 hour program.  Without commercials it is exactly 42 minutes in legnth.
1.  I got to use more efficiently approx 78 minutes of my life
2.  I got to watch the program when I wanted not when the network deemed I should.
NOTE:  The only thing that sucked was we lost power for the middle 45 minutes of the show.  Unless I have a UPS on it TIVO obvisouly doesn't record.  I ended up Downloading this show of the intardnet.  I felt guilt free for doing it because I did in fact watch (skipp through at high speed) the commercials for the first 15 and last 15 minutes of the show.