I don't have a 9, but I have a 610 revolver (40/10mm). I love it but it is a bit different. It is a lot faster to load when you have pre loaded moon clips. If you just go out with ammo and a couple of moon clips, it's slower to load than a normal revolver because you have to load and unload the moon clips. I got 20 moon clips from TK (the good quality ones). I cant remember but it seems to me they were about $150 is for 20. They are still going but the S&W ones it came with are getting loose.
I dont know about the 9 but my 610 is very accurate, and happens to shoot 40 or 10 to just about the same point of impact.