Have you jumped? If not, you really should consider it when visiting Cape Town - the view from up there is remarkable (or so Kerry-Anne tells me) and the rush is unlike any other!
For reference, the entire experience took about 45 minutes (from walking in the door, to walking out after the jump) and the cost was a R1750. Downhill Adventures will also video the experience for another few hundred Rand, depending on the option that you choose.