We love ours. We feel the pro's outweigh the cons and most of the cons you can have a contingency plan. One of the biggest things you "hear" is that it isn't smokey enough. I have yet to have one judge ever make that comment or have one person that has tasted our food make that comment. One of our con's is the power can go out or the pot can fill up and we have remedied that by using an iGrill which is a Bluetooth thermometer that synches with an iPhone, iPad, or iPod. Now we can see where the temp is at in the smoker at all times.
Pros: Sleep, insulation, controlled temp, no bending over, nice capacity, very low fuel use (we use about 10-13 pounds of pellets at a comp).
Cons: Power can cut out at comps (we use a marine battery w/ an inverter), the pot can overfill and go out, mechanical parts could go out, people will call you a pellet pooper.