Never thought I would say it, but been using my Glock 34 at some IDPA matches this year, really like the gun, shoots nice and I can still conceal it easily (6'5" 220lbs). Still like my Kimber CDP best of all, but with .45 ammo prices the Glock rocks.
I shoot both IDPA and USPSA with a G34 and a 1911 and no matter how much I practice I can't seem to shoot as consistantly with the Glock. I know this is a personal issue as there are guys who can really make those Glocks rock. With me the shorter trigger pull and heavier frame of the 1911 wins out every time. I'll keep trying because when I carry I usually carry my G17 and I like to stay proficient with it.