A friend and myself went to Sal for a surfing holiday and stayed in this apartment. The apartment is very well equipped and clean. It's not luxurious or anything but it will suit all your needs.
The owner and his agent are both very friendly and helpful and are willing to give tips and advice regarding places to visit, restaurants, 'secret spots', etc...
The only downside we experienced is that without a scooter or bike, you will need to walk quite a bit as the center of Santa Maria is a 10-15 minutes walk.
Other than this downside we have absolutely no complaints regarding the place and I would recommend this place to other people.