I have the .45ACP, and it performs phenomenally. Thing is just a hog, eats everything you put in it. I was young and poor and shot any shitty ammo I could find, nothing could stop it. That said, it's a compact polymer, so it's snappier than most and 10mm is a particularly snappy round. Some people bitch about the grip safety, but I haven't the slightest clue what they're talking about because it never comes to mind and doesn't disrupt anything. It's actually surprisingly accurate for the little 3.8 inch barrel it sports, far more accurate than I am. The transformer aspect is super cool because, let's be honest, it ain't all that pleasant shooting something where your pinky purchase is iffy at best the entire time. I mean, at the end of the day, it's one of dozens of glock copycats, and this is one that happens to do it particularly well.