The glock has been around longer than any xd so it will have more people who have tried it, and essentially more people that like it. Im not a glock basher, they have been around for like 30 years for a reason, however the xd has ambidextrous controls, the slide assembly contains all steel parts, the barrels have traditional rifling, the xdm has adjustable backstraps, and the xd has been through the same torture testing that the glock has (minus throwing it out of an airplane, but come on lets be real here), the xd is comparably priced if not cheaper. Now I know the glock has a bigger aftermarket selection, however IMO when I pay 600 to 1000 dollars for a weapon I want to have change it, thats why we shop around. But thats just my 2 cents