I bought 2 of these & I'm VERY happy with the results.
I bought the same one. It is the exact same pot as the NB Mega Pot. I checked it out recently at the new NB in Milwaukee. The sandwich bottom helps prevent hot spots, and the side walls are nice and sturdy.
Only issue I have is that it is more on the wide side, and when I really get a rolling boil I can boil off 1.5 to 2 gallons in an hour. Same flame with a keggle and I get more like .6 - 1 gallon an hour boil off.