We haven't used it yet, It has taken several days to get it set up properly. This isn't due to any complications with the design. It appears to be well designed and is simple to set up once you know what to do@!? The issue is the manual. The unit comes with two sets of jets, one for natural gas and the other for propane. But the manual does not tell you which set to use for either fuel, or which set is installed. I had to contact support to learn that the natural gas jets are installed. On the bright side, their support is quite responsive and I had the answer within 24 hours. I attached the gas hose and attempted to light the burner, but there was no spark from the ignition device. I lit it with a match and the flame was very uneven with a tall yellow flare. While their manual describes adjusting the air supply to the burner, my device didn't match their pictures or description. I again contacted support and again, within 24 hours had an answer. They replied \"it sounds like you didn't install the battery.\" Battery, what battery? None was supplied, nor was it mentioned in the manual. Neither did their reply tell me the battery type or location. However, I turned the unit over and found a black cover that could be for a battery. Sure enough, it enclosed a space that looked like it would house a standard D cell. I had one and installed it. Voila, the igniters worked like a charm and for what ever reason, the burner flames were now perfectly even and blue. The manual is written by a non-native English speaker and can be cumbersome to interpret, but I believe the outer ring of flames are supposed to extinguish when the knob is turned past the \"ON\" (erroneously labeled \"MAX\" in the manual) position into the \"LOW\" area which would leave only the small inner ring burning for very low heat. This is a neat idea, but it didn't seem to work for me. Both the inside and outside flames are fully adjustable once they are ignited. Possibly this feature will work when a pan
mew 
