If you´re coming to Puerto Platas International Airport (Aeropuerto Internacional Luperón) - 6 km east of Puerto Plata, take a taxi (or just walk up to the highway to catch a guagua - far much cheaper) to Puerto Plata. Just tell the driver to stop at Supermercado José Luis (every taxi-drivers knows where it is). On the other side of the street you´ll find Swedish Guesthouse. It´s a very nice, clean, cheap family-hotel with friendly owners which I can highly recommend. Now it´s high season so you better make a reservation before you go there.
swedishguesthouse@hotmail.com