I didn't know too much about the CSX except when I saw it at the gun store yesterday.
So this is just my thoughts on it so far. I have been a range instructor since 2013, and I'm a good shooter, nowhere near the best, but I do well. So this is a small review I wrote over on the SW handgun section.
This is from a Law Enforcement perspective of needing a deep concealment handgun. I'm not a pro or tier 1 operator, just a guy that likes guns and has to use them for work.
My local store had one priced for $550. I held it and it felt very nice. Trigger was a little heavy, but not bad. I was looking for a small carry gun as I am in need of a few pocket pistols for various carry situations over the next few years. I had an EMP 9mm, and could never get it to run right. I had a Sig 938, and again had problems with it. My Glock 43x is great, but just a touch too big (this is the gun I use everyday at work when I don't have to carry anything substantial) and just deal with the size. I also have a G43, but always hated that it only has 6+1.
When I brought it home I noticed a few problems:
1. The extractor pin was not fully seated (was flush with the top of the slide, and not the recess). I pushed it with a decent amount of force with a tip of a pen and it seated and clicked into position. (I only realized that is was not fully seat by watching a few youtube reviews of the gun)
2. When loading the 12rd mag it will not drop free with more that 6rds in the mag. When full, I have to forcefully pull it out of the magwell. It will drop maybe 1/2 inch, then it takes a few pounds of pull to free the mag ( it is really noticeable, as I really have to yank it out). To me not a huge issue as it is not a tactical gun for my purposes.
3. When the 12rd mag is empty the filler sleeve around the bottom of the mag likes to catch on any portion of your hand/palm ( I have medium size hands), thus slowing the mag from ejecting or stopping it from ejecting all together. In order to guarantee the mag to fall free I have to baby glock my grips and extend my pinky and ring finger out straight to keep my had out of the way from interfering with the mag travel. The sleeve also like to turn 45 degrees as it feels like it is a little oversized and loose around the mag
4. the 10rd mag is very hard to seat, like very very hard to seat, but when full it does drop free, go figure.
5. The trigger return sucks bad, maybe it is just my gun, but I have no click at all when fully releasing the trigger. The trigger also seem to be very slow in resetting forward, almost like the spring is too light to push it forward, but the trigger has a heavy pull ( not sure of poundage, but very noticeable compared to all of my striker pistols and my 1911's), so it does not make much sense to me. I did have a few ghost resets (like in the TFB video), but i thiught the trigger was let all the way out and I do not hear or feel a click.
On the plus side the gun never had a malfunction and I cleaned it prior to the range and put 250 rds through it, 50rds of 124gr Speer lawman, and 200rds of 124gr Winchester NATO.
So far I feel it is more of a flop than a hit. It could change for me, but for right now I wish I just bought a Glock 43x mos instead.
Also for pocket carry it does feel much smaller that my Glock 43X. It feels like an inbetweener of my Glock 43X and Glock 43, but with 12rds ( so thumbs up to that).
Accuracy is still out for "ME". I shot it like crap for the first 100rds. After that I was keeping shots on a 6 inch circle at 7 and 10 yards. Recoil is like shooting my Glock 43 (Not great, but not horrible). My 43X is much nicer in the recoil dept. Recoil is a give and take for me with a gun this size, so it is not really a negative.
That is it for me now, and I am still very neutral on this gun as of now.