I used a MB dual fuel for a few years. The allure was that I could use the huge stash of cool wood that I had. You name, I had it. It was strange tho. Never used charcoal but propane and it either ran too cold or too hot. I used water for a while and moved to a foiled brick paver. Didn't really help with temps but the final product was better. More color and bark development. I can see it having problems holding temps if used in cooler temps and opening the door frequently. It is a larger cab size with no insulation. Contemplated a needle valve mod but on a whim I scored an MES for $99 and learned of the AMNPS and I am 100x happier. I made some great stuff with the dual fuel but it was a stressful smoke and needed nearly constant attention. MES + AMNPS is almost set and forget. This reminds I need to list the dual fuel on Craiglist…