The apartments are located in a complex built in the 80s and are generally two up, two down affairs set on the cliffs overlooking the Atlantic Ocean. It's a few minutes drive to Sardina.
The complex, also know as California Beach, is largely used by local Spanish people at the weekends. There's a small communal swimming pool, but the only bars are in Sardina itself a small town, which also has several restaurants.
The locals are very pleasant, be aware though they are non-english speaking. This is also the case in Galdar the nearest large town, which is a 10 minute drive. Even here the town seems untouched by the outside world, there isn't a McDonalds and Broadband isn't available. Mobile phones work OK though.
Throughout the summer there are a series of festivals (each town has its own), but night clubs are thin on the ground, and there are plenty of lively bars. The locals follow the siesta daily outline, working 9 till 1, sleeping until the next shift 4 till 8, and then staying up till the wee small hours.
The scenery is dramatic and very varied. One part looks like a martian landscape (Star Wars was shot nearby), another like the Arizona desert, whilst other routes take you steeply up to areas that are lush with vegetation and lakes at the top of the mountains above the clouds.
Divers though will be most interested in Sardina beach itself though. It's not large, but it offers some of the best aqualung diving in the Atlantic, and equipment hire is ridiculously cheap - something like 20 euros a day.
More info on http://www.theothergrandcanaria.co.uk