I just completed another class with my XDM. It was about a 1,500 round count course. No malfunctions of any type. I have yet to experience any of the breakages or malfunctions that I keep hearing about on the net. To be fair I did have a trigger job performed by Springer Precision and he did change out some of the factory parts. I don't believe there is an issue with any of the pistols in the XD series. I do believe there are some shooters who have difficulty keeping any gun running. The only thing that I have ever witnessed on one was a cracked block. That issue was taken care of when they made relief cuts. From my experience, there is nothing wrong with the design and it will function round for round with a Glock. My personal point of view is that most pistols today work just fine, it is the shooters that have issues.