Hotel Marriott Rivercenter, San Antonio Hilton Bonnet Creek, Orlando
Reachable on Twitter? @Marriott (though there was never a response to my direct message) @HiltonHotels
Responsive on Twitter? DM sent on 10/29.  First contact (a request for more info): 11/1.  My response: also on 11/1, shortly after getting the request for more info.  Still nada, as of the morning of 11/2. None needed.
Greeted at front desk? Yes, and the front desk staff was friendly. Yes, and by status, and the front desk staff member who checked me in remembered my name when I passed by later.  (Thanks, Ashley!)
Helpful bell desk? Yes. Yes, and each member of the bell staff went above and beyond, especially Ezra, who made sure in advance that I would be able to make a fast exit when I needed to make my plane.
App with room key and chat option? Yes. Yes.
Functional room? Yes, but with the Tub from Hell (see below). Yes, and with a glorious view.
Problems with the room? There was a hangtag that said that, if I wanted a rubber bath mat, I could request one.  After almost losing my footing in the Tub from Hell, I requested one early in the morning via the app.  I was told that housekeeping would leave the mat outside my door.  Nope.  Later that day, I was told that the mat was left in my room.  Nope.  When I went back to the chat option to explain that I had not received the mat, I got…crickets.  Nada.  Nothing on the chat.  Nothing on my Twitter DM. n/a
Responsiveness to chat option in the app? Not if you count follow-through or actual help. n/a
Did the hotel go the extra mile? Absolutely not.  I received half-hearted apologies for the mistakes but nothing beyond the bland, corporate “sorry.” Yes!  After I mentioned to the manager of the bell desk how helpful Ezra was, Ezra (and his manager Joseph) arranged to have chocolate-covered strawberries sent to my room—in essence, thanking me for thanking him.  Outstanding service.
Would I stay at this hotel chain again? Not bloody likely, unless I have no choice in the matter. In a heartbeat.

UPDATE on 11/7/18:  Marriott gave me 10,000 Marriott points for my trouble.