The only thing that I do not like about the SSBT mash tun is the EPDM (it looks like EPDM) gasket around the false bottom. However, it is made in China, and I have yet to encounter a Chinese-made stockpot that is as close to being perfectly round as a Vollrath or Polar Brew stockpot. The gasket is more than likely there to accommodate less precise manufacturing tolerances.
With that said, if they are close to being perfectly round, More Beer's new BrewBuilt kettles are an amazing deal. They have the nicest non-robotic TIG welds that I have ever seen on a brewing kettle. They have a rolled edge at the top. The weld on the inside of the kettle is perfectly flush. I have loved every Polar Ware Brew Pot that I have owned. They were the first home brewing kettles to ship from the factory with welded fittings, but the lid handle design was made with stacking in mind, not removing when hot.