No Internet! My employer booked this hotel for a one week worldwide Sales Conference. This was a group of about 300 people. Some presenters had to have Internet working in order to present. Most of the attendees also needed internet to check email and get some work done.
The Wi-Fi internet network did not work at all the first day and even after the hotel IT added one wife router, the network was still not working.
Other issues. The food and drink prices are double what you find in the local places. The first two complimentary water bottles in the room were not replaced. There were maintenance going late at night where they used a very potent chemical which smell would get inside the room through the door jamb gap making me feel sick for a couple nights.
Finally the beach is not so great. El Condado beach in San Juan is much better.

My husband and I spent last week at the Rio Mar and had a wonderful time. The staff are professional and helpful. Shuttles run like clockwork, as do the golf course and spa. The resort is beautiful - landscaping and beach are gorgeous. The beach sand is the color of light brown sugar and the water is cool and clear aqua. The room is a nice size for two people - we had a rain forest/mountain view. The beds are very comfortable and the decor is neutral and crisp.

We knew prices would be in resort range from the reviews here, but made it work with breakfasts in the cafe by the casino, usual size lunches and not pigging out at dinner. Honestly, we were not here to eat, with the exception of trying some Puerto Rican cuisine. Time on the beach in a swim suit was much more important. We did splurge on drinks. They are $10 but you are on vacation!

We fed the iguanas twice, my husband golfed on the River Course, we toured the rain forest and took the Sail & Snorkel trip. The rain forest is a nice day - great scenery, a hike, and lunch at a local roadside restaurant. I am now addicted to mofungo. the sail/snorkel trip is a wonderful day on the water.

The night life after dinner is limited to the casino and the pools. Walks on the beach are romantic - lots of moonlight and starlight.

This is a great location for a true break - everything you need is on site. The Rio Mar is a good first timers location. Our next trip we will rent a car to explore Puerto Rico on our own, but this was a lovely introduction.

I read most of the reviews before we went, and all I have to say is, all the negative reviews, forget most of them. We had the most wonderful and relaxing time we ever had. Sometimes, when I get stressed at work I think about our time at the Rio Mar. My wife had the spa treatment while I went scuba diving for the first time.
My wife came back so relaxed that I wished I had the massage instead of going scuba diving. The entire place was beautiful, and relaxing. The staff was wonderful, and polite. At the end of the trip my wife did not want to leave. The only two points from most of the reviews that were true I felt was: 1) The food was over priced with not much seasoning, So you don't get the true authentic flavor of Puerto Rico. 2) Being on the resort you don't feel like you get all the authenticity of being in Puerto Rico. You can't get off the resort unless you rent a car or take a tour. We took the tour and had such a wonderful time that we didn’t have time to try the local cuisine like we wanted. Don't hesitate, go and have fun

I booked a 5 night vacation at the Rio Mar through CheapCaribbean.com. Here are the "pros" and "cons" of the hotel:

Pros:
(1) Very good location! Luquillo Beach is one of the nicest beaches on the island.
(2) It's directly across from the rainforest.
(3) The views of the rainforest are beautiful
(4) The golf course is the nicest in Puerto Rico.
(5) There's a separate pool just for adults
(6) My 10 year old daughter loved the pool and the waterslide.
(7) It's located 3 minutes from the horseback riding site
(8) The property is very lush

Cons:
(1) The food and drinks are overpriced. $3.50 for a cup of coffee?
(2) This is a convention hotel. It caters to conventioners.
(3) The exterior of the hotel needs a fresh coat of paint
(4) The beach has brown sand. If you're idea of a great beach is sugar-white sand, don't come here. Go to Culebra. Playa Flamenco is clearly one of the best beaches in the world. Envision a Corona commercial.
(5) The nightlife is totally DEAD. We didn't care because we had our daughter on this trip though.
(6) The rooms are simply OK. No complaints, but nothing special either.