My friends have joked that I have a complete set of Robust tool rests and I protest that I am still missing a few. Needless to say, I really like them and prefer them to the other cast iron rests that I have.
I want to comment regarding denting the hardened steel bar. Yes, I have had catches that were violent enough that I dented my Robust tool rest. My lack of skill is the real problem and fortunately I don't have a lot of them. One dent in particular was bothersome and I spent a while with my sharpening stones to smooth it out. It was easily smoothed out and is used on many of my turnings.
Cheers,
David