Only real problem that I have ever had happen to me, and seen someone else duplicate with a different G29, is I can definitely have problems if "limp wristing". Good grip on pistol, no problems.
I haven't been successful in attempts to get the pistol to misfeed. I hope it stays that way! If I have two complaints about the pistol it's that I'd like a bit more room under the trigger guard for my middle finger (it gets dinged on each shot) and I wish it were thinner. I'd happily give up 2 or 3 rounds of ammo for a single stack magazine and a thinner profile. It's a small handgun, but it's as wide as a Lamborghini.
But hell, I knew that going in.