we've got one of the really cheap ones. less than 10usd, bought early-winter. it's not big or powerful, just 400w--which is just about right for where and when it's used.

it has a tip switch.. i think those are mandatory these days.. dunno about any other safety features. it doesn't even have a normal thermostat. when it's on, it's on--so it does get physically unplugged from the outlet when it's not in use, just as a precaution.