We LOVED Villas Rios Mar on the same level with Banana Azul at Puerto Viejo! We stayed at 5 places in Costa Rica and they were our favorites.
The grounds were beautiful. The room AND deck space/setting were wonderful! The only things that were a bit of an issue were the safe never worked for us (poor instructions/key use etc), the closet doors were jammed and unuseful, and we were the farthest room from the front desk/restaurant and had trouble with the WIFI. But those things aside, the beauty, the breakfast, pool and overall vibe and resort, made up for it all. Thank you Villas Rios Mar for a great experience!! Would definitely return!