Century City is definitely not a tourist destination by any means.

Century City is a comparatively new development. There is lots of accommodation, the Protea Colosseum Hotel looks pretty luxurious.

The Mall is one of the bigger ones in SA, not sure whether it compares with some of the Dubai Malls or how the prices compare.

There is also a theme park in the complex, Ratanga Junction. Unfortunately it is only fully open November to mid-January (peak season)

For me, one problem with staying at Century City is that it is pretty isolated, yes there is the mall, plenty of restaurants and entertainment but it is about 10 km outside Cape Town, so even to look round Cape Town you would have a car journey.

Personally I would prefer to stay in the city, V & A Waterfront area for hotels, restaurants, entertainment etc. You could have a trip to Canal Walk, Century City if you really wanted to visit the mall.