Just returned from Vieques and had a great stay at Caribbean Vista. Both the house and the pool were better than expected and that was tough to do - given the great pictures of the pool. The house was on small side, but perfect for three of us. The house was clean and comfortable and it had a nice bathroom. The listing should include pictures of the bathroom as it was nice, especially the shower. There is another house immediately behind the house, but not once did I see or hear anyone from that house.
The house is in a great location, less than 5 minutes from Isabel Segunda in one direction and 5 minutes from the entrance to the National Wildlife Refuge in the other direction (where my favorite beaches are: La Chiva (Blue Beach), La Plata (Silver Beach, and Pata Pieta (Secret Beach)). Sun Bay and Navio Beach are also close by.
Make sure you go to Coqui Fire Cafe, but make a reservation (they only have 7 tables). Conuco, El Quenepo, and Next Course were also excellent (although El Quenepo and Next Course were on the expensive side). At Coqui Fire, the pork carnitas were out of this world. At Conuco, the chicken fricassee was also outstanding (as were the mango margaritas). If you're looking for a great breakfast, you should go over to the W Hotel. I have stayed at the W on my prior trips to Vieques, but enjoyed the privacy of Caribbean Vista so much more.
Finally, the owner of the house promptly answered all my inquiries both before and after I committed to renting.