All i know is that on this two night trip that I'm currently on...
Last night I arrived and checked into an SPG property (b/c I was automatically given a 4PM checkout for today) and tonight Im at the Hyatt b/c well I'm leaving early enough that it doesn't matter about a late checkout.
Whenver I need extra time in a room, its ALWAYS an SPG property for me
yet they have the same problems that Marriott has cleaning out rooms but they somehow someway seem to manage to get er done