Not much to add beyond what others have said. Reliable, accurate, great double-action trigger.
Bedair makes a stainless guide rod for it if you desire.
The factory night sights are a nice bonus.
My only gripe, and it's a minor one, is the grip design. My little finger is on the magazine, not the grip, and the magazine "wallows" around in the mag well a little. I wish the grip was a little longer so I wasn't contacting the magazine. You expect this in compact and subcompact pistols, but it's the only full-sized pistol I own that has this "problem".
Other hammer fired polymer framed pistols are the Beretta PX4 line.
The SP2022 is the most accurate 9mm pistol I own.