Just spent 3 weeks with a group at Colinas del Sol. It absolutely felt like home. The staff very quickly made the point of knowing all our names - there was no request they didn't meet. The rooms are simple, but clean and well planned with good closet and drawer space. The grounds are very natural with lots of birds; the pool is fabulous, food was VERY good.
The hotel is about a 20 - 25 minute walk to Atenas, but a taxi costs about $2 each way, so very easy to access.