Love the Assassin. We got one last winter and have been cooking every weekend since. It takes some practice to get down cooking times, temps and hot spots but it really does make a great product. The bbq guru that comes with it is sooooooo easy to use....you can fill her up with charcoal and go to bed and she will stay at the desired temp all night, no problem. The only thing I would advise is that if you will only be pushing it around on a hard surface you will be fine with the casters that come with it, but, chances are you will want to put on some pneumatic tires like we did to push it on the grass or soft surface.
Chris Hart - Perfect Rack BBQ - Chelmsford, MA 2-22.5 WSM's 1-18.5 WSM