Myself and my wife travelled to South Africa for our honeymoon in October 2012 and decided to base ourself in Camps Bay to explore Cape Town. V&A Waterfront is 15minutes or so in a cab so you literally are on the doorstep. Table Mountain is not even a 5 minute drive away so you are right in the centre of everything.
Back the the Crystal. The accommodation was absolutely superb. Fully contained kitchen, living area and a massive bedroom & bathroom. Very secure, underground car parking and staff who were more than willing to help us with our every need. A service is provided to guests at the Crystal where you can get free transfers to The Bay Hotel. Its probably a 15-20minute walk down the hill from The Crystal to the beach which is fine during the day but much more handy to avail of the free car service at night. Safe and secure, you cannot go wrong here.
If you do not fancy a hotel booking and are looking for something that caters more to your own needs and gives you more privacy and space, The Crystal will definitely provide you with this. Would return in a heartbeat.