Went in 2015.

Went in 2015.
What we loved: Beautiful hotel. Small enough that it's not crowded and you can get to know other guests. Private beaches. Access to sailing, water sports at a whim. Great french restaurant. Nightly intimate concerts - some were absolutely outstanding and I would have paid to attend! They make you feel welcome. You have access to the other nearby Sandals resorts and shuttles to get you there, but the other resorts don't have access to this one. It's not a constant spring break/party atmosphere like the other resorts - it's relaxing and elegant. Butlers were willing to run to the next resorts to get specialty foods that the Royal Plantation didn't have.
Could have been better: The private beaches were a bit small, so when most of the resort occupants were on the beach it was a bit crowded for our tastes. Snorkeling only 1x/per day - I'm a bit picky, I could snorkel all day long. Restaurants were a bit limited in fare, though the pub certainly tries (we asked them to make some nachos, which was clearly a foreign concept, but they tried - priceless!). You still had to make reservations to the French restaurant, which was annoying. I wish some of the excursions were not built around everybody getting drunk in the first 5 minutes. Sometimes the butlers were great, sometimes they seemed put out that you would call them.
Would we go again? Definitely!