I had a pleasant stay at Mar Azul, my studio was spacious enough as I stayed inside for 2 entire days and 1 outside, I love the veranda that lead you over the very green garden/ backyard (perfect place for pictures).
The utility was convenient, just what you need plus the extra details such as salt/oil/vinegar/napkins.... that will avoid you to buy the basic to cook.
I was in Las Terrenas for the first time and find the residence in a good location, just a few steps away from bars/restaurants and downtown.
Upon departure I asked directions to go toward Las Galeras, the owners offer me to travel with them up to Samana and from there I took a guagua to Las Galeras... such a nice gesture from them. You should definitly give a try to this residence :)