We spent several nights at Casa de Luna while exploring the Arenal area and we loved it. Our room (in the B building on the second floor) had a great view of both the beautiful grounds and the Arenal volcano-at least when the clouds lifted, but this is the rain forest after all. We were disappointed that Arenal is no longer erupting regularly and we did not see an eruption during our stay, but the hotel can't be blamed for that. The staff was very friendly and helpful--arranging tours without a mark-up, putting our passports in their safe, making spa appointments at the last minute, and giving restaurant recommendations. Our room was very comfortable if a little small and I loved the wooden chairs on the balcony. We had very relaxing massages at the spa and enjoyed their outdoor facilities and shower. Breakfast was included and basic but sufficient. It's just outside of town so it's nice and quiet, though it may be slightly inconvenient if you don't have a rental car. We would definitely return!