This is such a vague benefit how do you know you are getting a better late checkout time than a non-elite? I'm at a FI, and they told me the latest checkout time is 1pm. That's an hour after the regular checkout time. I've gotten later checkout times at hotels I don't have status with. If they don't list a specific time, I see this benefit as useless. Doesn't Starwood specifically say 4pm? There are some hotels, that do go above and beyond, but in general it's not a benefit you can count on 100% of the time.