We stayed here the week of New Years. It was fantastic and had everything we needed! The house is new, clean, and stocked with pots/pants/utensils/grill/washer/dryer, etc. It is just steps away from the beach. There are also a few restaurants and a corner store all within a short walk.
The house is in a gated (and guarded 24 hours) community just south of downtown Jaco. It is close enough to walk into town on the beach (or take a quick cab ride), but removed enough to offer privacy. The neighbors were very friendly and quiet. In fact, we had the pool to ourselves every time we used it.
For those looking to do activities, you can rent surfboards and paddleboards right on the beach. The property owner is also available to help you book day trips (i.e. ziplining, atvs). There is also a fantastic location for viewing the sunset a short hike (15-20 minutes) up a hill.
I would definitely stay here again and recommend it to anyone looking for a place to stay in Jaco.