We loved every minute of our stay in Tortuguero and Casa Marbella. We liked staying in the town. Casa Marbella is well located, though nothing is very far. Our room was simple but comfortable. Breakfast was good. Daryl and his staff were very nice. Daryl was responsive to email in making the reservation. It's a great value.
There is not much in Tortuguero that is right on the river. Casa Marbella is. We loved sitting on the deck right on the river, for breakfast, sitting there while using the internet, watching the sunset, watching the boats go by and the children swim.
We enjoyed the early morning boat tour with Roberto.
As others have said there isn't much to do inTortuguero. We only stayed two nights and really weren't ready to leave. We almost stayed another day. Three days would be nice if you enjoy just hanging out. I highly recommend.