I visited the beach during the low season for three nights with San Blas Dreams. I would recommend it, but if you prefer a quieter atmosphere, especially during the high season, I would suggest choosing a different island to stay on.
The swimming and snorkeling experience was absolutely beautiful, and San Blas is truly incredible.
The food provided was filling and of decent quality.
The dorm accommodation was comfortable enough, but if there's no wind, it can get very warm at night, which could be an issue on any island without a fan.
The beach is the busiest on the island, and during the day, it attracts many tour groups. However, you will likely be taken to a different island while they visit, so it ends up being okay. I believe it could be a bit too hectic during the high season.
Unfortunately, the locals were not very welcoming. On the first night, they played loud music until 1am, which made it difficult to sleep.
There are no mosquito nets provided for all the beds.
The undeveloped part of the island is like a trash bin, which is quite disgusting.