Aside from operator error problems, I'd recommend it.
Now it seems I can't live with out it.
It's pretty cool, Tivo will let you rewind something you were watching. You know, sometimes you want to hear something again or see something again, or you can even pause your programming to get up use the bathroom, do errands or take a phone call. Then when you are ready, you can come back watch your show you wanted and just fast forward through the commercials.
I'd say one of the top inventions in the past decade