Our family didn't care much for Jaco, but our consilation was that we stayed at a great hotel. Our room consisted of a separate air conditioned bedroom a second bed in the main area, a full kitchen and bathroom. The rooms were very clean and comfortable. The hotel was located a few blocks from the main drag of Jaco. Jaco is a loud party town so having your accommodations away from the noise is good. There are grocery stores a few blocks away. You can walk but we usually drove because it was so hot.
The breakfast provided was very good! There were the traditional beans and rice and eggs. As much juice, toast, and coffee as you liked. The food was well prepared and tasty. Earlier reviews indicated the breakfast was marginal but the owners must have upgraded the fare.
The highlight for the kids was the pool. The pool was very nice, clean and not cold. The grounds around the rooms, pool, and breakfast area were very nice. Lots of fragrant flowers and very well kept. The breakfast area was also very pleasant.
Just a word about the towels. When we arrived there were only two large towels in the room. When we checked out the maids insisted there were more towels. They let the issue go. We stayed at several hotels in Costa Rica during our month stay there and I recommend that when you enter your hotel room and there don't seem to be as many towels as there should be, contact room service immediately. The hotel managers are very sensitive about "missing" towels.