My dad has one he bought at CostCo. He uses it all the time.
I have personally cooked 6 large pork butts on it in the middle of a monsoon thunderstorm and it cooked like a champ.
It might have some hotter spots (toward the edges) but not enough that it effects the cook much. 6 racks of ribs cook evenly.
He has had it for over a year and has had no problems. Ribs, tri-tip, pork butts, briskets, potatoes etc he cooks it all.
Its not a grill so don't go in thinking your gonna get a sear at all in stock form.
He only uses Traeger pellets so if you use something else. YMMV
Smoke flavor is much lighter than with the WSM but sometimes that's not a bad thing.
He loves it and it cooks well. If you have power, it has been set and forget for him every time.