We've spent 2 weeks at Turtle Beach.
Our host, Brian was very helpful from the beginning. Quick, detailed answers to every question.
You won't see him much around, though you are always welcome at their other place, John's Escape (midway to town) where I've had some cozy talk with him and his wife. They are very kind, and if you need something they are listening. You can get help with arranging programs, they've set me up for scuba diving which I really enjoyed.
The property is lovely, if you like remoteness and wildlife you will love it. Not much tourist you will run into, but a new animal around the porch for every day is guaranteed.
The house is comfy for two, and it has most of the thing you would need. Most of the issues from previous comments are addressed.
Our caretakers seemed a little lost at the first days, but make sure to talk to them, they are kind and funny (as every people in Belize), we've had a couple of campfire on the beach with great food and talk.
As I said the location is amazing, the jungle is just a couple of meters away, and the corall reef is also very close.
Ideal spot to base all the snorkeling, diving or fishing.
With remoteness comes some thing you may or may not like.
There is a road in progress from town but after rain can be difficult to get around with golfcart or bikes. We mostly used Coastal Express.
If you would rather eat out every day, there is a hotel down south, but not really good to walk from there in the evening. Other option is John's Escape, or closer to town.
You really need to plan how to get around (though I loved it), it might be an issue for some.
And finally, our biggest issue (though it is in no way Brian's fault) is the massive amount of trash and seaweed washed ashore every day. On most properties people clean up the beach daily, but those places waiting to be sold not clean at all. No matter how much our caretaker worked on it, it is all over the place every day. It applies over all of Ambergris Caye. Hopefully this is something getting addressed by the authorities in the future. On windy days the water gets real murky too, so if you want some clean water the best thing is getting a kayak or taking a boat to the reef.
Anyway, we've enjoyed the calmness of the place, sitting on the porch while listening to the waves from the reef and watching all the wildlife showing off in front of you was amazing.