With (89) reviews at the time of this writing, there is not much else to be said. I have (6) 4x6 stall mats in my garage gym and they work great. They do not slide around much because I have storage on some of them. In my old space, I held them together with mending plates based on recommendation from Alan Thrall. I have never considered taping them down, mostly because I expect to continue to reconfigure the gym.
Performance
Value
Build Quality