Very pretty, good for swimming and surfing, manned by lifeguards.
Chairs and umbrellas to hire, lots of shacks for drinks and snacks, good beach restaurant, friendly cool surfing dudes and pretty girls! Good for people watching! Can recommend the coconut drinks and barbequed cheese on sticks from the man with the little mobile bbq. Lots of locals selling snacks and crafts but they don't pester you.
Word of warning - don't hang around after dark or walk into town after dark. Lots of reports of assaults and muggings at gun point from people by the surrounding favelas. They target tourists. Only carry small amount of cash. Take motor taxi (motorbike) or call for a taxi.