I just shot a match with my CFR-MIL RS.4 last weekend and it worked fine. It would be an atrocity if a scope in this price range sucked. I'll give a comparison between my RS.4 and Cronus BTR.
In low light, the Maven is way brighter. I made this comparison in my dimly lit basement at night and was really impressed with the Maven.
At 10x and lower I had some issues with windage holdovers at my match. .4 and .6 mils are similar enough that it was hard to pick out. I kept inadvertently focusing on .8 when I was trying to find .6. Not a huge issue with training, but I did notice it, and I'm kicking myself for not practicing properly behind the reticle before the match. I'm also too new to the long range game to have a Range Finder yet, so when practicing out in the desert, I range with my reticle. The RS.4 has .1 gradations both vertically and horizontally, far enough out of the way that they're not noticeable when shooting. Cronus only has .2 mil gradations.
I like the illumination on the RS.4 - it's kind of red dottish partial illumination everywhere else. I actually like this much more than what I've had on my Viper PSTs, Ares ETR, and Cronus. I tried to get a decent picture, but holy cow, getting a camera to focus on the reticle was hell. Sorry for the potato pic. Illumination has options for both green and red. I'll say that the Cronus has a much brighter Illumination range, but that's not important to me. I use illumination when shooting in early morning hours when it's dark.
Turret feel winner goes to the Cronus BTR. My elevation turret isn't mushy per se, but it is a bit more smooth than "clicky" if that makes sense. I tried taking the O ring out and it made it about how I'd expect a good scope to feel, but I'm leaving my O ring in because I think doing otherwise is going to invite problems, especially shooting in the moon dust of the desert. The Cronus' clicks are OK. I'm pining over the strong clicks and solid feel of my Ares ETR that I sold to finance the upgrade to the Cronus. For turret feel, Ares ETR > Cronus >= Viper PST II > Maven RS.4.
Zero setting on the RS.4 is the best I've ever used. Using nothing but your fingers, you unscrew the top of the turret, pull the turret off, and put it on again at zero setting. Done. Better than the Cronus, Better than the ETR, and miles ahead of the Viper PSTs I've owned.
Eye relief, eye box, and sight picture - The Maven has to sit back pretty far on the rail to get a full sight picture, especially compared with my Ares ETR and Cronus. The ETR felt like it had to be as far forward as possible with the stock at full extension. Cronus somewhere in the middle. I make this out to be a bigger delta than it is. The ETR's eye relief is listed at 3.9", and the Maven's is 3". It's no ACOG. The sight picture or window, or whatever, on the Maven is Huge. Getting behind it, it fills your view, and the black ring around the outside is tiny. The Cronus feels small, almost like it has a smaller field of view, even though they're about equal. The black ring around the Cronus is very large. It feels like the scope is far away, and I guess it is farther away by about .5 inches anyways.
My biggest issue with the closer eye relief is that I have to set the scope pretty far back, and cant' take it back further without cutting my picatinny rail to accommodate it. I'll probably end up doing so. If you're on an R700 SA clone, you might not have this issue. I have a Tikka, so the receiver is pretty long, and so is the rail on top.
I really like the mag ring on the Maven. The magnification numbers are printed on the objective bell rather than the ring. I found it easy to memorize which positions are which magnifications. 12 is at 12'o'clock, 10 is at 11'o'clock, 18 is at about 1, or 1:30.
Parallax is 15yds to infinity on the maven. Most scopes are 25-Infinity. At 10x, I can resolve 1 MOA dots on the other side of my house, so I don't have to get a DFAT to practice. I'm never going back to a 25yds min parallax again.
When stepping up the magnification, the Cronus seems to start getting dim at about 14x where the Maven seems to my eyes to stay bright and clear until ~18x. I feel like the Cronus gets darker at max than the Maven does. I don't really go beyond 18x, so this is mostly just a reference for those that do.
Finish is more glossy on the Maven than on the Cronus. I noticed at the match that compared with my squad's TTs and Nightforces, mine was much less of a matte than theirs. Not an issue for me though.
Overall, I like the Maven better than the Cronus BTR. I like the looks too.