I've got one although it's only in my garage right now. It's 3.9 cu ft, about 22" x 22" x 34" which is a very convenient size. It's an Avanti chest freezer I got on CL for $50 and the thermostat gadget for keeping it around 38F was another $50 or so. I've been monitoring its energy usage since last summer and it was averaging about 16 watts in hot weather.
I kind of actually want one of the smaller variety (which is 16" x 16" x 34") freezers since 3.9 is actually pretty damn spacious when you don't have all the shelves and trays and stuff.