Mariana's B&B is ok if you want to spend few days in a very nice and quiet location and save money.
What you get: a small room with a small sofa-bed, a nice bathroom with shower, a microwave, a toaster, a fridge and a coffee machine.
What you don't get: there's no room for much else, so there's no place where to hang beach towels or swimsuits, there's no place where to have a meal (there's half of a small round table where to have a quick breakfast), and they don't let you use the washing machine.
Mariana and Carlos are nice and friendly. We definitely recommend this place for a short period (2-3 days).