Jim, yes I stayed in unit D8. It was great with amazing views. I liked the unique cozy curvy design of the kitchen/living room area.
I have not stayed at The Phoenix (yet

) but I have toured it and sent clients there. It is also very nice with high quality construction and furnishings, and well run. But yes, it is not as secluded and quiet an area as Gr Caribe. Plus it would have way more boat traffic if you plan to swim in the sea right out front. For me personally, I like to be right in town or close because I am usually running around like a crazy person when I am on the island - seeing people and places, having meetings, etc. so the Phoenix would be very convenient for that aspect. But staying at Gr Caribe made me feel like I was actually on vacation for a change and in some ways forced me to stay put and enjoy the surroundings more than I usually would! A "normal" tourist would have a great experience at either place
Like every hotel in Belize, it depends on what you are looking for. These days there is something for everyone!