"High Cap" mags are only 11. If you are in a State that only allows 10 round magazines, it fill the bill well.
As stated, solid pistols. Weak link is the ejector. Some folks force the slide back on after a field strip and break the ejector off. With the slide open, the lever visible throught the ejection port on the lect side is the ejector. It should protrude about 3/8" into the magazine well if it is intact.
My personal preference is to take the factory flat back grips off and replace with the arched standard grips from the 5906 (they are a drop in replacement).