Mr Heater is great but run it off of a tank. Green bottles suck. I wish it had a more granular temperature control as well because sometimes something lower than the Low setting would be great. I know a few companies make true refillable "green" bottles but until they come out in mass I always try to use my tank. NOTE: if you get the Mr Heater hose to use with a tank it is VERY pressure sensitive. If you turn the gas on too quickly the internal valve will close. So the trick is to barely open the valve, light the heater or other device, and then open the valve on the tank fully. I really like the $56 11lb tank that Home Depot offers online. It's a good compromise between the traditional 20lb tanks and the smaller 5lb tanks.