I just finished a stay here as a Titanium member, booked with points, got upgraded to Plunge Pool Room.

The elite breakfast is continental only. Didn't pay for the upgrade since the buffet spread was extremely small.

I also stayed at the Aloft Tulum, Papaya Playa Project (Design Hotel) and Planet Hollywood Resort All-Inclusive Cancun. All have very different vibes but i think I still liked the St. Regis the best.