I've had one for about 3 years. Love it. I never buy ice. It will run off a Honda 2000 easily enough. The unit I have (I'd have to check the back for the brand/model) only revs the Honda up above idle for the first compressor cycle. After that, each cycle doesn't seem to require that much juice. If I start it between A/C cycles, I can run it all night with the a/c. However, I usually make a couple of batches of ice and the store them in the Waeco freezer (another fantastic investment, if you've got the room...darn thing can run all night, along with my 12v fridge, on a single group 31 battery).
--Kurt