I am pushing 10k on the full size I use for competition, and concur with WARDOG68. Even on recon competitions with dirt and mud in the pistol, it worked with just the regular (heavy) recoil spring - I had no issues with it not returning to battery when fired, only when the slide is manually cycled. IMO it's the most comfortable full-size, striker-fired, polymer pistol to do volume shooting with on the market today.
The only other beef I have is the slide stop spring is generally too strong for the 21 round magazines to actuate once the magazine spring gets a little older. This is what causes the slide to not lock open on the big mags.
I carry the compact daily, it has seen a number of courses and competitions too, and it's my goldilocks grip size between the Glock 19 and 26 in terms of grip.
For the pre-panic prices, it was a total steal.