I stayed at the Plaza this month with the SB Surge group and had a blast! I don't normally spring for all-inclusives when traveling. But that aside: the rooms were super clean and spacious, the staff was friendly and attentive, the internet was fast and I enjoyed the food (especially the beef and seafood).
Toucan diving organized fun and varied boat dives every morning. They really seemed to go the extra mile - keeping track of who needed Nitrox and DIN and making sure our boat was stocked with the correct tanks before we arrived each morning. Our DM (Mariska) had eagle eyes for safety, was really aware of the whole group each dive and even provided one-on-one instruction to those who requested it. She was also really good at finding tiny creatures that the rest of us would've missed otherwise.
To me the best value of the place was the convenience. The house reef is gorgeous and the night diving there is spectacular. You can label Nitrox tanks and leave them out and the resort staff will deliver them to the house reef, so you don't need to spend time lugging tanks around. And the tank room is located right next to the parking lot which made grabbing tanks, loading up the truck and driving to shore sites a breeze.
If (hopefully when!) I return, I'd be more likely to rent a condo + truck and skip the resort. But if I was looking for another all-inclusive I wouldn't hesitate to return to Plaza.