I couldn't praise them more for what they do. My astronomical world took a new direction when I bought my first (yes, I have two).
I have broadcast all over the world on my channel and as a guest of others:
http://www.ustream.tv/channel/ajs-night-sky and made a whole raft of valuable scientific obsevations including:
http://www.youtube.com/user/astrojunk
Not to mention the fun of just imaging using a dob!
The only other CCTV contender which is worth considering is the Watec 120N+ which uses a similar chip, but has a longer exposure length should you really want to go deep. (not nearly as flexible though).
If imaging is your thing, then the DSI II that Bintel are selling off cheap at the moment is outstanding value...