Laguna de Apoyo and The Monkey Hut were both highly recommended to me by fellow travelers. Although the Laguna is beautiful, I don't think it's necessary to spend the night there. You can enjoy it in a day.
That being said, our stay at the Monkey Hut was one of the worst experiences of our trip. When we got there, they only had dorm space or their private cabana available. My boyfriend and I chose the cabana, which was pretty expensive. They add 15% tax to EVERYTHING there, and they charge on outside beverages, which is really annoying. I've never heard of any hotel anywhere even charging 15% tax on a room.
We arrived early, around 10 and were told the cabana wouldn't be ready for us til 1, which is understandable. However, it seemed like they only sent the cleaning staff down to clean it after we asked if there was a place we could put our bags while we waited for the room. It seemed ridiculous hat we were paying that much and they weren't trying to get us in the room ASAP.
The service at the Monkey Hut was awful. Service throughout Central America is pretty bad by US standards, but here was especially awful. The front desk clearly doesn't want to be there and is not friendly at all. It also seems just like they want your money (I mentioned the tax thing), but they also charge you to stay there if you want to hang out for a little past check out time.
Some good things: full kitchen you can use (definitely cook for yourself, the food you can order from the comedor is not that good). The place is also clean and has pretty fast wifi. Their kayaks and tubes are nice to use and it's a good view of the lake.
I would NOT recommend staying here to other travelers. It might be okay to come here just for the day, but if you're going to stay at the Laguna overnight, avoid the monkey hut!
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.