In many aspects this is a very typical Cuban resort, meaning that:
sometimes there are no tomatoes, sometimes there are power failures, sometimes things don't work, sometimes the shower is cold, sometimes the elevators fail, sometimes the ac is down, sometimes the orange juice runs out, sometimes the entertainment is cancelled, sometimes the bikes break down, internet is slow, international phone calls are a pain, limited resources, but most people are helpful and friendly, it's safe, there is excellent live music, no strip malls, it's cheap,...that's Cuba.
However, there are several things which are special and stand out in Brisas Sierra Mar:
The surroundings are stunning - beach, mountains, and cute small villages with many opportunities for nice hikes, walks and great snorkeling. The beach is 4km long and beautiful to walk on with great sunsets. A few locals sometimes follow you a bit on the stretch which is not directly on the hotel front. (On the hotel front they are not allowed access).
The road is indeed bad, but quite typical for small roads in Cuba and takes 2 hrs to Santiago.
High median age of guests, which makes it more of a quiet place and less a party destination and requires decent mobility (many stairs).
For Cuba the food is above average and hygienic.
Some kids might get bored, since there are not many extra activities geared to kids except for a caregiver during the day. (Our 4-year old enjoyed her stay).
Great views from most rooms.
Brown beach (this is not for everyone). A little further in the water the water floor is not great for walking or standing, since there are some urchins. For swimming its fine.
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