It's a good Zapper! I've used it for a long time, and while I have not used any others (so I can't tell you if any could be better) I had superb results with it and have always highly recommended it.
As far as techniques go, I liked using the 7-20-7-20-7 session and Zapping in bed with the copper rings on my toes! :) Also, if you go to the Zapper Image Gallery you'll find a picture of my Zapper in a sock - this is one thing I found handy for protecting it. (I used to fall asleep with it on and sometimes it would wind up in odd places.)