The "Grip Zone" emblazoned on the frame is a bit cheeseball. Perhaps they could have labelled "Muzzle Zone," "Bang Switch Zone," and "Rear Sight Zone" as well.
It is thinner and more ergonomic than the XD's traditional grip, and the grip safety blends a bit better with the backstrap. The one thing I don't like is that the bottom of the trigger guard has a pronounced edge and tends to bite my middle finger.