I always like the thumbreak. I just bought a Don Hume Agent 711 for my XD9SC. If I carry IWB, I don't care about the thumbreak, but outside the waist I just feel a little better having it. I can draw just as fast with a thumbreak as I can with an open top, so why not? At least I know if I go bouncing around on the ground or in an accident of some sort, I will still have my firearm.