I liked the grip shape and texture on the MR920 I had ( vulture gun buddy talked me out of it). I recall the texture as more comfortable than the Gen5, but still effective. They include grip inserts which alter the grip angle a bit too. I switched to the one that was more 1911-like.
The optics capable version sits the optic lower than other pistols, meaning you can use the lower profile sights included with it and still co-witness, if your optic itself is sufficiently low profile.
Make sure you like using one of the optics compatible with your Shadow, though: it DOESN’T fit everything. The manual tells you which dots they have tested, and maybe their site does too. Works with Swampfox Liberty for sure, which has a nice low profile.
My one significant disappointment with my Shadow was that the trigger was mediocre; a ripoff for the higher price even though the rest of the gun is a bit better in terms of features, style and feel, than a standard Glock.
Having just looked at their site, I noticed their Foundation series loses several of the premium features mine had to get a lower price point. The grip frame sounds the same though.