The M9 was pretty much rubbish, imx. Slavex reported similar problems to the problems I've encountered so I assume they are universal. One of the big problems was the loaded chamber indicator which caused malfunctions, I remember someone on here asking how to chop the tip off! So they've redesigned it into the M9-A1. Not sure if it's any better.
It's got the same triangular sights by the sounds of it, which sound cool but the tip of the front sight is hard to pick up and it caused me to shoot high, I remember watching a guy shooting one in a Florida IPSC match, the S40 compact model or whatever it was called and all his shots were going high.