If you are a person that wants to lay out in the sun and hang out in a pool all day drinking then this resort is for you. If you want to walk the beach or go exploring, then this is not the resort for you.
We stayed 6 nights, recommend asking for a room that overlooks the pools, all of those have an ocean view. We were in room 325 which had a great view. The rooms are clean, beds are very comfortable, with fridge, iron and board, hairdryer, bar area with variety of cocktail glasses, in all rooms. You cannot drink the water from the bedroom sinks, but they do give you plenty of bottled water.

Food was good, recommend the JWB Steakhouse and Frank and Lola’s. You need to make reservations as soon as you arrive as they book quickly. The breakfast buffet was excellent, with a wide variety of food.
There was not much day time entertainment, you make your own fun. There is NO BEACH, the resort literally sits right on the water. We love to walk beaches, and did so 4 days, but it is a little treacherous with the rocks and you definitely need water shoes.

The Landshark Bar had some good nightly entertainment and we enjoyed sitting on their deck oceanside for drinks and dinner. It is an adults only resort, so nice not to have kids running around.

My sister and I just returned from our stay for 10 nights in a Oceanfront Paradise Swim Up Studio at Margaritaville Beach Resort by Karisma, Riviera Maya, Adults Only. I have given the review a 3 rating due to the fact that most travel sites has this listed as a 5 star resort rating and this is not near any of the other 5 star resorts I have visited in the Riviera Maya (i.e. TRS (both), Haven, Valentin Imperial, Excellence, Xcaret Arte, Iberostar Grand Paraíso & Paradisus La Perla) just to name a few. Don’t get me wrong this is a lovely & clean resort, the room was very nice (with the exception of the FREEZING Swimout pool) and all the staff were very welcoming, however given the various annoyances listed below that have been experience at every other 5 star Riviera Maya Resort, this should be rated as a 4 star and priced accordingly as well.

Annoyances (Again considering a 5 star Rating & Current Pricing)
None of the pools are heated & are FREEZING!!!!
No resort & room overview by assigned resort ambassador, nor any followup/check in after resort check-in
No slippers or flip flops to use in the tiled rooms or swimout patio especially when wet & slippery
Very limited Room Service Menu
Lunch restaurants continuously running out of food options (some option weren’t available for 7 plus days)
Limited restaurant options, especially for dinner
When the resort with the rooms that are currently open was fully occupied, there weren’t enough servers whether at the pool, pool bars or restaurants. On 2 evenings it took us over 2 ½ hrs to obtain our complete order and finish our dinner
No bags or baskets available in Joe’s Merchant when selecting room provisions
Need to carry room provisions from Joe’s Merchant back to own room
Pretty much only 1 evening entertainment option (band & Dj in the LandShark bar/restaurant)

I would like to call out employees that were always pleasant and made you feel special when encountered: Mari P. our assigned house keeper & Angel at the Salted Rim bar.

Would we return to Margaritaville Beach Resort by Karisma, Riviera Maya, Adults Only in the future, No unless the pools become heated and the pricing reflect more of a solid 4 star resort.

We choose this hotel based on its Trip Adviser review on Quality of Food and Standard of Hotel and we weren't disappointed.
The food is of a consistently high standard in both the buffet restaurant and the specialty restaurants.
The hotel rooms are amongst the best we have ever stayed in and are kept very clean.
The majority of the main hotel rooms overlook the pool areas where during the day the pool entertainment is very loud and by night the evening entertainment too loud. This was spoiling our enjoyment of the holiday so we got in touch with the holiday company who arranged with the hotel to have us moved to a quieter room which resulted in a wonderful upgrade to an ocean view suite! There are other quieter rooms which don't have pool or sea views but they don't get any direct sunshine.
The hotel also lists that there are water sports available at no extra charge (with the exception of scuba diving). There are in fact no water sports at this hotel.
We enjoyed the beach which is not directly in front of the hotel building but a short walk. The shore line is rocky which means a short walk to enter the water.
Special mention to some memorable staff who really brought a smile to our faces every day.
Joel and Ramon in the The Boathouse, Annabelis in the bar, the ladies in Joe The Merchants who were all was so friendly and welcoming. Last mention to Miguel at the Tennis/Pickelball courts, book at lesson with him and you won't regret it. We learnt Pickelball and are now hooked.