Did a lot of research on internet before I bought this trailer. Car Mate is the only one that (in my honest opinion) meets my expectations for what a contractor rig should have for a base model. I upgraded to 1/2 inch walls 16 on center studs for shelves and headroom. Radial tires, self-adjusting brakes are things I don’t have to worry about. Painted floor. I put in just what I wanted for a base and will build the shelves myself. It was not the least expensive but you get what you pay for and that is all I can ask.