We haven't stayed at Ocean Manor, but have been hanging out with some vacationers from the States that are there on a week vacation. They said it's not bad but not great. They love all the Happy Hours the place has (apparently 2-3 throughout the day/night), but said it's an older/quieter crowd there this week.
If you haven't checked
Cabarete - Dominican Republic - by Active Cabarete that seems like a great site to compare the hotels listed for Cabarete.
Enjoy your stay!