Just got back from 3 nights here and my fiance and I had a great time. The staff was very welcoming and helpful from the moment we arrived until the moment we left.
The tree houses have all of the accommodations you could need and are tucked back into a beautiful jungle setting that let's you completely escape into privacy.
The pool and pool deck are gorgeous, and the swim up bar is great.
The beach is a quick walk across the road and has the soft sand and light blue water you'd expect to see anywhere in the Caribbean.
The food and drinks were excellent with plenty of options.
It's been said before in some of the other posts, but bug spray is definitely recommended for your trip.
Also, make sure you take a trip up to Rick's Cafe to see the cliff divers and beautiful sunset.
We will definitely come back to Sunset at the Palms the next time we come to Negril.