I don't do them that much, but I don't do any video workout that much in the summer.
I do really like his workouts, especially the way of alternating segments of kickbox-like cardio and weight work.
IMO, he does a nice blend of functional fitness and traditional weights, and his form pointers are usually really spot-on. I also like that they workout on platforms, because it keeps everything in a space that's workable in my living room!
I had his earlier show DVDs, with the shorter workouts on, but they are annoying, because where the commercial breaks supposed to be, you are supposed to continue on with a move, and you never finish unless you pause the DVD.
The newer, longer workouts from his show are better, as are some of his more recent DVDs.
(And he's really nice to look at as well!).
I know the music is repetitive (the same music on each workout ) but for some reason, it doesn't bother me. Maybe because I just register it as an audio cue to workout, and it's music that is exclusive to his workouts.