I used to have one of these. very easy to program, and it sounded great. unfortunately, the battery that backed up the memory settings died and, when we tried to replace it, the whole thing fell apart. :(
I did write down the settings for my 3 or 4 fave self-created sounds and, if I ever get another one, they'll be the first things I do with it.
http://www.youtube.com/watch?v=z5y7mx1v9OU