I have used it. I guess its good, if you can believe the sales hype. Its supposed to help reduce the effects of stiction.
I do believe that the ways that it runs on need to be kept very clean, because the stuff is soft enough that dirt and chips could embed in it, and then be scouring the ways for the rest of the machine's life.
I saw a "not so professional" retrofitter apply a couple of little rectangular pads of the stuff at each end of a lathe carriage bearing. Needless to say, it will wear down because it is soft. So, I'd recommend full bearing surface coverage, and epoxy cement the turcite in place. Clamp the carriage firmly to the lathe bed, with C -clamps on the corners while the epoxy sets up. This should result in a perfect fit for the turcite.