I have the Baghdad Bullet, the Ranger Bootlegger, the Devils Elbow, and the Street Scapel. Great fit and finish on all four. I've had Benchmade, Spyderco, and Kershaw knives with grind issues on the cutting edge and the upper area of the blade. Four knives is a small sample, but so far I'm impressed with the consistency TOPS has shown.
Yes the blades are thick, only the Street Scaple would shave hair off my arm right out of the bag. But, I carry a TOPS knife as a back up to my cutting knife (BM Stryker, CS XL Voyager, CS Rajah 2, etc.). The TOPS knives make good pry/stab blades if ever needed.
With TOPS and Buck Knives being right next to each other, and are collaborating on at least one knife I own... I will assume their heat treatment is pretty good. My 2¢.