I have a Kamado (not Komodo Kamado) and it's great. I can't say it's better than a BGE or any of the others. My guess is the performance is very similar for all of them (Grill Dome, Kamado, Komodo Kamado, Primo, and probably another I'm forgetting).
To me it came down to aesthetics. Big Green Eggs and Primos are ugly, Grill Domes slightly less so, and Kamados are works of art (Komodo Kamados look good too but they weren't around when I bought mine).