[Kristen]

The only thing wrong with it, IMHO, is that it has one temperature, one speed, so if you leave it on overnight its going to use X units of electricity. I use it only a few times a year, so that isn't a consideration, but for frequent users I reckon you would either need to generate your own electricity or buy a more controllable model with air-flow designed to be more efficient.

The fact that the exhaust air is not used (via heat exchanger) to pre-heat incoming air is pretty scandalous in these more greener-days ...