Had one and went back to my trusty old 1911's. To me the trigger was terrible and the double action was awful.. The next generation 4506 has a better trigger and a bit better ergonomics(feels a bit better in the hand). That being said..the 645 is a well built gun. Heavy and usually shoots pretty well. I sold mine just because I had gotten so used to the 1911 I didn't want to change...and I had a few of 'em too.
