I bought the 18 first and love it. I just bought the 22 cause I have a few big smokes. Actually just did 8 butts for my daughters graduation. I have noticed that the 22 wants more fuel at around 10 hours. Only my second smoke on it so it is still working on Getting it fully seasoned. I put the 18 on craigs list and when I got a bite I couldnt sell it as I want both! The 18 will probably be my day to day smoker for the family butts but the 22 will do my ribs as I can lay them flat