I bought the 4.5 model and have been to the range with it twice. A friend came with me on the second trip and also fired it. He has since bought one for himself and sold his Glock 20. They are that nice.
First range trip. 12, 15, 20 and 25 yards. My 25 yard group only opened up because I quickened my firing tempo mimicking something charging me like a wild boar.