Our family of four (two adult 'kids' and our parents) stayed here in Jan 2013. We stayed in the Casa Hoy, which is actually used for overflow when the rest of the resort is full, and we loved it. We had plenty of space to enjoy some time alone, but also had relaxing game nights on the decks and watched the monkeys swing by for hours.
Encanta is the perfect place if you truly want an adventure. We loved hiking, swimming, observing the various wildlife, and just relaxing at the pool. The staff could not have been any more accommodating, and we left feeling like we would miss them! The food was incredible, and very fresh/healthy. We loved the drinks, and the bartenders were fabulous- serving up local creations with fresh mangoes, etc. I'd absolutely go back!
This is not like going to some generic resort, it's a ecolodge, so I wouldn't recommend it to a high-maintenance friend-- but if you're up for really experiencing the jungle, it cannot be beat.
The weather in January was stunning, hot, sunny, but there's enough shade around to cool off.