I'm not a proponent of safeties on a gun. If you have kids your worried about shooting themselves or accidently shooting someone else that's not really a gun problem, it's more of an owner/circumstance issue. But I do like the feel and usefulness of the palm safety on the xds that I've shot.
I haven't really researched or watched reviews or know the history because a couple of my friends actually have them so I've seen them, held them, watch them be shot and shot them.
Unlike some other guns I wasn't moved and wasnt like " I gotta get one of these" but I really didn't have any issue with them.