I have an RS.4. It's a good scope.
Optically it's very good. Good eyebox, parallax goes down to 15yds, so I can resolve "targets" on the wall on the other side of my house, zero setting ridiculously easy, and it's a very short scope (I have the sunshade on mine). Turrets are next to completely silent and pretty easy to turn. Turrets feel a bit similar to a PST II, maybe a bit lighter. Reticle (CFR-MIL) is pretty nice, very legible. I compared it with a Cronus BTR I back in December - the Cronus had nicer turrets, the Maven had better low light transmission. Maven's parallax knob is pretty stiff. It has a ridiculously large range of elevation. I haven't tested it's tracking at those far edges though.
I think it holds up to the competition in its price range pretty well. I liked it better than my Ares ETR I used to have. Not as good as my USO FDN or Steiner M7XI.