I have several, including three 26.75" kettles, a 22.5, and a Jumbo Joe (my stovetop during comps). My 26.75s have a Smoke-EZ smoker conversion kit and the 22.5 has a Cajun Bandit. I use no less than two of them in competition, as well as the 22.5. They're my equivalent of Smokey Mountains, and I like to use different woods, cook at different temps, etc. This allows me to do that. I also cater as well as cook quite often for crowds at home, and I need all the volume I can muster sometimes to fit everything I'm cooking. Plus, as others have mentioned, they're toys and indeed the one with the most toys wins...lol. 
Not sure if that helped to answer the question..