Originally Posted by chriseng

I'm being told the 4pm is only for "available room categories" (i.e. not suites), but this is not spelled out anywhere in the Bonvoy guidelines. My understanding is it's a guarantee except at the specific resort/convention properties. Does anybody know if there is an exclusion of this nature documented anywhere? For this stay I actually am using SNAs to upgrade a standard room, but that's happened in the past too, and the 4pm guaranteed checkout was always honored.