I just received my Matias Mini Tactile Pro in the mail this morning. First impressions are highly positive.
I'm a little surprised that Matias keyboards and switches don't generate more buzz. I did some searches on the forums and didn't find much beyond a couple of comments about crummy Matias build quality, with one comparing it to Unicomp. Looking at this keyboard, I don't see it. The fit and finish are clean and attractive to me, much nicer than my old Unicomp Spacesaver M. The lasered legends are not the most lovely that I've ever seen, but they're OK, and the plastic molding looks clean.
I'm new around here and don't have a lot of KB experience compared with most of you, but I do have three mechanical keyboards: the Unicomp, a CyberpowerPC with Outemu blue switches, and now this Matias. All three are fundamentally good, but I have to rate the Matias as my new favorite. The key action feels excellent to me, not stiff and clunky like the Unicomp; the spring force is perfect. The sound is clicky but not super-loud like the Outemus. I found myself immediately typing faster on the Matias. (My fingers fumble for the arrow keys, but I'm sure I'll learn quickly!)
Apparently the Windows version of this was discontinued? Well, I use mostly Mac and Linux here, and I find that Mac layout keyboards work very well for me on Linux. I just go into the configuration and swap the Control and Command keys, then it's all good. Windows keyboards are more awkward to me.