anyone used it? Is it any good?

 

I used it under my cab, in the fender wells, and in the engine compartment. It can be a bare to keep clean, however, it does stick very well if primed and prepped properly. I haven't used it in the bed yet, but am going to. If you have the tools to apply it (undercoat gun, good way to apply primer or sand down to existing primer), I would recomend it.