Sorry, kjay, we ended up not selecting Cahuita, but went with a place near Liberia. The area might be a bit more touristy but I felt with only 7 days, and really that's only 5 days because of travel, that we'd be better off with a place that is easy to get to.
Cataboo had found one place, Vista Villa Mar, that she wished she could spend several days in. That seemed perfect for us. Not too much sight-seeing, just lie around and enjoy the beach & howler monkeys!
The sloths sound really interesting and it was something I looked into when we were planning this. Sloths are such unique creatures!
2009 Trek 7.2FX WSD, brooks Champion Flyer S, commuter bike