i know back in the late 90s early 2000s, the mono blocks were prone to splitting, haven't heard anything bad about the newer guns though. I know only 1 guy who uses the x9, i don't know how much he shoots but it hasn't given issue in the past 3 years he's had it. I have shot it, feels reasonably well made for what it is.quality isn't quite at the same level as browning or beretta. At that price id be leaning more towards spending a bit more for a Beretta.