I have owned a 4th mod 17 for a couple of months. Really like the grip size without adding the spacers. Mag release is ok just dont seem important. Only problem is the 8 lb trigger pull, smoothed the vertical tab on the trigger bar as it was as rough as a file. Helped some but still after 500 rounds it is a lot heavier pull than my 26 or my law enforcement trigger in my 3rd gen 22.
Model 22 trigger is really, really nice.