Meade DSI ccd Imager

Anyone got one of these? What kind of success have you had with it? What
size scope and what is a typical stack of Images for a deep sky photos?
(i.e. 20 30-sec stack images ideal for most situations?) I've got a 5' f/5
refractor and a 5' f/12 mak. Pictures of the moon and Saturn look pretty
good a 60X with the Mak. Will need to use a 2x or 3x barlow to see what
kind of detail can be had with Saturn and Juipter. Let me know what your
impressions are of this camera and what your success rate has been
photographing various Messier objects, planets, etc. I'd be interested in
hearing from anyone on this subject. I'm new to this kind of thing and it
intrigues me.

Richard