It does decent... but out of paranoia of breaking the stoneware, I got a round aluminum cake pan to help spread the heat and keep the exhaust from reaching it. It's a little bit different than cooking in it with the OEM heater, but probably not as much so if you use it as most would - for "liquid".
I'm still experimenting with it but haven't run it in a while as I'm tinkering with everything food related to try and keep variety going... easier said than done for sure LOL
Steve