Great Place, Great Host!
My wife and I stayed a week in June 2022 and had a great time. For us it was the perfect mix of adventure and luxury. The condo is well stocked. Island was easy to navigate.
We rented a cart in town for the week (Unique Cart Rentals) and had excellent service everywhere on the island. We flew Tropic Air (my wife sat in the co-pilot seat!). One day we took the Express water taxi to Belize City for a tour. Both were easy and comfortable. The food at the resort, Gem Restaurant, was excellent and the staff was very accommodating. There are kayaks, paddle boards, and bikes for free on site. We went North of tranquility bay where you can snorkel the reef from the beach. We did take a kayak from Sapphire one day and snorkel. The reef was awesome but it's about a half mile off shore and there's more current (not good for a novice).
There are three small stores, about 5 minutes cart ride south of sapphire, good for basics like rum, beer, soft drinks, and snacks. Two of them take credit cards.
The only down sides for us were the mosquitos and the sea grass on the beach. It was the rainy season and the staff had people out everyday working to remove the grass and they fog for the mosquitos. However, despite Deep Wood's OFF we got a lot of bites. The smell of the grass can be bad. Apparently this is a problem this year all up and down the Mayan Coast.
I want to go back and stay again while getting my basic dive certification!