This all-inclusive property recently changed its affiliation from Hilton to Globalia, and is now known as the Oasis Marien Hotel. My own stay occurred less than a year ago but during the time of its earlier name brand. That being noted, some impressions and recommendations are probably still valid.
The basics are still in place here: the hotel has 325 rooms in a series of three-floor buildings that provide plenty of garden space and open areas in between. Rooms are spacious, have a somewhat standardized look Caribbean decor and bright color scheme, plenty of drawer space and closet area. There is a patio that gives you a view of the gardens and, if you are in the right building facing the right direction, a view of the beach and ocean.
There are three restaurants on the premises to choose from, one being also a round-the-clock snack place where you can eat anytime. The other is a huge buffet-style establishment, while the third is a sit down, service establishment. There is a small shopping plaza onsite with boutiques selling clothes and Dominican handicrafts. The concierge desk in the lobby can usually arrange outings into the nearby Dominican countryside and the kiosk at the beach here has a variety of sailboat and windsurf boards and instruction available. You may note that taxi rates to various points nearby and along the north coast are posted on a sign at the hotel's front entry. You can try to negotiate downward on this with the man who heads the bellhop desk and seems to be in charge of arrival operations there. Explain where you want to go and quote your own price; he may counter but you may still come out ahead of what is "official" price.