We stayed at Casa Chanty in early March and LOVED it. It was so private and secluded - and quiet! The property is absolutely beautiful and there's no way you'll get that close to the beach at any of the big resorts. We could even hear the ocean from our open windows at night.
I was concerned about the beach being dirty since there's no resort to take care of it, but it was really nice and clean. The walled in front yard of the property is where we spent most of our time. There's a great sunbed, hammocks, and several lounge chairs.
We stayed in the smallest unit, and it was really well equipped. We didn't rent a car because we didn't want to deal with driving in Mexico (I'm sure it would've been fine though), so we took a shuttle to/from the airport and used taxis to go to Playa del Carmen for dinner one night and Puerto Morales twice.
We had the shuttle stop at the grocery store on our way there, and stocked up on beer and supplies to make our own meals. We even got ingredients to make pina coladas and daquiris - their blender works well and we loved having the huge clean water jug in the kitchen to make ice and for drinking water
We would love to come back to Casa Chanty and we thought it would be a great place for larger groups as you can rent out all three units.