I don't have one, but I've inspected a standard model in the store. Reminded me of a Glock grip with a different backstrap profile and angle. Usually, I'm not a fan of finger ridges but they aren't a drawback on the APX in my opinion. Arguably a better frame design for CC due to being a bit more "melted" in the angles, trigger like a VP9 or PPQ but with stronger reset, better slide purchase for racking. The Combat has an RMR/reflex mount I believe, which the PX4, VP9, PPQ, or standard Glock models do not AFAIK. For the price, I doubt you can really beat it for a striker fired suppressor host. I've heard there are a few triggers you could upgrade to if you fancy going a bit more high speed. Personally, I like the idea of a PPQ with a Tornado Technologies threaded barrel a bit more, but it would also cost a little bit more and wouldn't have a factory RMR mount. Like I said, for the money.
The only thing I did not like about it was the barrel hole in the slide is a bit off center of the bore. Doubt it matters at all, if anything Beretta did it for a reason, but it didn't really jive with me based on looks and general ignorance to whatever advantage it might grant.