I just came back from 5 wonderful days in Cape Town. I wanted to share that I am black female traveling alone and I had a wonderful time. In fact I am looking forward to going back again!
As I was traveling alone, I did sign up for tours prior to my arrival. I used Rhino Africa and the arranged everything! It was great. I stayed at the Hilton Cape Town ( see my review). I never felt unsafe and I am happy that I went.
I did the standard tourist stuff, Hop On Hop Off bus, Robben's Island, Cape Point, etc. After the 1st day you start making friends as a lot of the tourists are doing the same thing, and you start seeing the same people.
I did a lot of shopping! Mainly at the V&A. For the tourist stuff I was buying, I felt the prices were the same just about everywhere. Make sure you keep your receipts for the Vat refund.
I will be heading back, soon I hope!