A-hah! This interests me greatly as I - not too long ago - had conversed with one or two other posters who'd - by-the-by - made some reference to things corporately Sheraton in an initial question I'd raised about keyless entry at Sheraton Vistana Villas. Without looking back for specific quotes from that brief thread, I won't here add any detail for which I'm totally ill-equipped to further comment. I do know that I just racked up many SPG points on a recent split-stay, and am now wondering if those SPG points might be honored and transferred over to Marriott Rewards...If not, I - apparently - need to get online and book another Sheraton vacation, soon!