I did not have this model, but it's twin the RS100 Q, without the C. The difference was mine was the model with an on-board fan for active dust collection, while the C model has non and relies solely on a dust collector. Beyond that they're basically the same.
When I just got into Festool there was a period I would buy every Festool I could get my hands on through the used market, try the tool and sell it off again if I didn't like or need it.
So also with the RS 100 Q, my impression is it was a very heavy and powerful sander with a smooth operation. Not as smooth as the RS200, but still a big machine that slides over the surface with little effort. Also easy to control. Not comparable to the Rotex though, it has nowhere near the same removal rate. But very good to smooth out the bigger and rougher surfaces.
My focus with sanders is mostly on paint prep for houses, so this one had little use for me and I sold it off again. But since you work with inlays for floors, I can see how this would give you a little more oomph than the RS200 you probably already have. But don't expect it to be a square Rotex.
