I have Glocks, M&Ps and an XDM 45 compact. The xdm does not have a lot of muzzle flip. It pushes straight back. The ergonomics are exceptional and for a compact 45 it is accurate and is comfortable to shoot. I bet the full size is just awesome. My 9mms jump up more than the 45. Hold an XDM before you buy a Glock. There are still so many people who buy Glocks just because there friends buy them they think it's the only reliable gun, they see them all over and are brainwashed by all the glock talk. Find unbiased articles about both guns, hold both, try to shoot both. The XDM is a more refined gun in my opinion. A lot of people will tell you to get a Glock, but yet have no experience with other guns. I think Sprinfield looked at what Glocks were lacking and really put out an amazing gun. I'm not impressed by the changes on the Gen 4 glocks. The replaceable backstraps suck compared to the M&P or XDM and I don't care for the finish. I like the Gen 3's better. There are no reliability issues with the xdm and plenty of accessories are available. People had hesitations when the M&Ps cam out too. Now you're starting to see more M&Ps, XDs, XDMs and FNs at the ranges. You can't go wrong with any of the above, including Glocks, but I love my XDM so much, I'd like to get one in 9mm now.