I am thinking about renting a house at San Antonio de Belen, Bosques de Doña Rosa. It is very close to the American Free Zone and to the Mall Cariari and there is a Bus Stop close by where you can take the Bus to San Jose. I am currently staying at the place for one month and I really like it.
The house is fully furnished and all services are incl. – cleaning, internet, water, electricity as well as usage of swimming pool and a small gym. Laundry service and breakfast could also be incl. (if you need it). We would live with two people in the house and each one has its own bathroom and there is one additional small bathroom for guests. The house is in an closed area so it is very safe.
The monthly price would be about Protected content 700 dollars. I still have to ask and negotiate the exact price ;).