I shot a 45 once and it worked for the few times I fired it. It was big, heavy, ugly, not very accurate but it did go bang each time I pulled the trigger. From other reports on these guns I must have been lucky that it did go off each time. A guy I work with bought one, I don't know if he got a chance to shoot it yet but he likes it. Of course he isn't much of a gun guy, he bought it because of the price. I would not buy one because they are big, heavy, ugly and, in my experience, not very accurate.
One positive about the guns, if you use it for self defense and it doesn't go bang when it's supposed to they are so heavy that you could hit the person with it and probably get close to the same results!
Joe