My wife and I hired this hotel's services for our wedding and that was the best choice ever made as all went even better than planned. If you want to feel like home this is the right place. Once you get in, there will be no need to get out ('til chech out comes) as all you might need can be found within the hotel.
We had the best time during our stay (a whole week!). Defenetly this is a must.

Costa Sur was a location we reserved simply due to its availability with timeshare trade. The accomodations are very simple. The room was clean and bathrooms decent. The kitchen is functional if dated. We had a large tv in our room, but with spanish channels there wasn't much appeal. The main complaint of our room was lighting - all energy efficient bulbs in a very cold blue color did not add appeal, and many of the fixtures needed new shades, i.e. were bare bulbs. Felt a bit cold. The front desk was helpful and friendly. The prices are very high at the resort for food, so if you are able, stock up at a grocery store in town before getting to the resort. Not much of a beach. The pool area is simple but relaxing. The main pool is not heated. Not a great resort for families, but okay for the budget traveler. The location is right on the ocean and a bus will take you right to Puerto Vallarta for 7 pesos.

I took a time to write this review because I wanted to be objective and quiet making my final impression. Excuse me for my English, it might be not perfect.
For beginning general impression about this hotel seemed good but only until the first lunch/dinner.
So about the food. Unfortunately Costa Sur doesn´t really care about the quality of the food. Even I´m not talking about the taste, cause everyone has own preferences about that. But as for me – it was the worst food I´ve ever tried and trust me – I´ve tried a lot. But when they used to organize Italian or Mexican buffet, it´s so awhull... I live in Mexico 2 years and I know how the real mexican food tastes like. And Italian. And French (onion soup in Costa Sur it´s just a lot of boiled onion with vinegar). Even that day I asked a waiter if their chef was a mexican? He said yes, all of them, indeed... If I had cooked such food for my husband, he would divorce me already.
What made me think that food quality is bad? Was not my imagination, no. Let me tell you what I saw by own eyes:
They serve a breakfast at morning and then without washing the dishes on the same plates they serve lunch and dinner. I discovered that eating a green salad for the lunch and I found watermelon seeds into it.
I saw a lot of insects flying around some "fresh" vegetables and salats.
The buffet is serving on the open area, the average temperature of those days was about +28. And normal duration of the breakfast/lunch/dinner about 4-5 hours. Is simply dangerouse to keep the products outside with these conditions.
During Mexican night there was a guy (kitchen assistant, not a chef) who was serving tacos with choriso. When he thought that nobody was looking at him, he opened a pot with chorizo and ate it. By hands.
The pork a la mexicana was not prepared, half ready and with blood.
The food in general seems to be recyclated.
On the third day of our stay there I´ve got food poisoning after trying mexican buffet. I didn´t eat outside, I was washing my hands before to go to the toilet, and I didn´t drink alcohol.
On Sunday night I felt bad, I´ve vomited more than 12 times for few ours together with terrible diarrea. When at 6am my husband went to report on the reception about my situation, a porter (Andres) said that it was my own fault because nobody else was complaining. A-a! You´re lying! The same week there was another case with an american couple, they also got food poisoning and you can check another review on this page from 12th of Nov.
So Monday morning we went to the nearest hospital and I made blood test. I attached the results so everyone can check that I´m not lying. The doctor said that this kind of poisoning is caused because of the bad quality food or spoiled products. So my only mistake was to choose Costa Sur for our vacation. We´ve expected to spend great time and in the end the most of vacation I spent in the bed and I couldn´t eat during 4 days. Is this what we paid for?
So the only one thing I liked was the waiters staff.

every thing the honeymooners 12 22 2012 said i agree with .Old and outdated. we stayed 1 timeshare trade week. .we wanted to leave at first.but moved from the 9th floor to 5th floor #515 corner.at lot quieter,didn,t hear road noise so much.that helped . The road noise was so bad above 5th floor had to sleep on pullout sofa living room the first night . we spent all our time on our patio ,plus private beach. that was great .HOTEL STAFF WONDERFUL. some money NEEDS to be dumped into the place.i would go back ,because i,m over the shock of the rooms not being nice. we mostly stay at gold timeshare resorts.we do like how small the property is ,and sets right on the sand . liked being close to downtown.went to 2 very nice restaurants ,THE River Cafe good food - music and Hacienda Alemana 50% off mon and tue great food .