Although a lot of reviewers seem to have problems with the owners of Calalú, I have received nothing but good service from them, and they do not strike me as particularly unfriendly or unreasonable, and definitely not mean, as some seem to think. I've never had any reason to complain, though, so perhaps I've just been lucky and avoided their dark side; my impression is that they are reasonably polite and helpful people.
I've stayed there seven times over the last years, since the cabinas are cheaper than most other decent options, and a lot nicer than the cheaper options. $40/night ($60 for 4 people) is quite a bargain, considering that it's peaceful, yet close to town and the beach. And it has a pool, which is nice enough and not dirty.
The rooms are simple, yet nice, with large bathrooms and a terrace. Some have a small kitchen with fridge. The kitchen could use a little upgrade, though; it's more suitable for storing beers in the fridge than for cooking.
I recommend Calalú for laidback, self-going people who do not need luxury to make their vacation perfect, yet don't feel comfortable in the cheapest places. If you get personally offended by missing details, you may want to pay a bit more somewhere else.