We stayed for 10 days at the Pelican Hotel at Esterrillos Este and enjoyed it.
The beach is really uncrowded, the sea was nice although kind of rough at times for swimming but perfect for surfers.
The rooms at the hotel were Ok but I recommend the upstairs rooms; superior accommodation and worth it.
There is a restaurant at the hotel and the food was outstanding; fresh fish on most days and the cook and waiters very accommodating; we could order typical local fares and all prices were reasonable.
Had problems with getting money from ATM machines at Quepos and had to go to Jaco; Quepos does not offer much as compared to Jaco for shopping, sightseeing etc. Esterrillos is about halfway in between the two towns about 20 kms from Jaco and 15 from Quepos.
All in all, we would like to go back.