the propane it uses has to be replaced often.  will get costly. but you can buy an adapter kit to be able to connect it to a big propane tank that would sit under your patio table for around $25.00, plus the cost of the propane tank.  Otherwise it will be a pain to continually run out of propane and have to spend more $ every time I need a new mini tank, as it is designed for. Looks great, though.