Other than I don't like extended slide stops (mine has been shortened), the trigger is my only complaint.
The fit is sloppy, it's not adjustable, and basically looks like crap. That's easy to fix for $20 or so with a Wilson triger(or any one of a dozen other makers).
I've been using 4 factory mags quite a bit lately with no complaints. It also likes Wilson, USGI, and CM mags.
Take the cast extractor out of the gun and throw it out of your car window while driving at high speed on the interstate. It will land in a place appropriate for cast extractors(anywhere but in your gun).
Replace it with a quality extractor from Ed Brown, Wilson, etc... Be aware that it will stick out the back of the slide about 1/16". Use a file and some cold blue to make things look right although it will function just fine with no filing.
If you don't like littering while driving fast on the interstate, then keep that cast extractor for an emergency spare. Just throw the trigger away...