Yes I use them. Not often but there is a great use for them. There is my wife, our recently divorced best friend roommate and myself. I might be at a point in a show that I can't finish it - I can bookmark it and come back to it later.
I actually miss the Exit and Stop functions for recorded shows working differently. If you have multiple viewers in the household it was great - Stop would rewind to beginning and Exit would Pause at your point.
Only feature I miss from Tivo (besides obvious dual tuners) is that within 5 mminutes of the end of a recorded show hitting List brought up the delete option and if you choose No it rewound to beginning. Hate having to FF.