I have the larger RMS on a Q5. Yes the dot intensity is 'auto adjust' on this model too. AND, it works flawlessly....plenty bright in the closet or outside....it adapts to the ambient light almost immediately.
The RMSc is quite a nice little optic from what I saw -- very lightweight and unobtrusive. It's also quite a bit lighter and thinner than something like a Trijicon and thus I wonder how well it would survive heavy usage -- probably it would survive the usage, but impact or dropping, etc. would clearly have a worse effect than on a Trijicon.The dot on the PPS M2 RMSc is listed as a 4MOA dot. I was told that it is actually a 3.25 MOA dot as some folks did a measurement on it. Either way, most people recommend using a 3 or 4 dot MOA for precise shooting, versus the larger 6MOA dots or even larger. I haven't seen the RMSc in person yet, but I can't wait to.
As Fart says, depends on the holster you have currently... My Stealthgear Mini IWB required some "Dremeling" to fit the RMScDo you need a different holster to compensate for the optic? I wouldn't think so, but just checking