I stayed for over two months I can immediately say that this is an excellent place to stay. Private entrance, alarmed and secure in a really nice area. Close to all necessary amenities. The hosts are really great, always willing to help and great with communication. The flat is stylish with modern finishes, a really comfortable bed, and a great shower / bathroom. The kitchen is well kitted out, but it is small, only big enough for one person at a time.
The area is really great, allowing you to jog right out the front door, or come and go at any time of the day without worries. It is close to the Durbanville wine farms as well which is a real bonus. The only problem for me was that I was commuting to Rondebosch often, which will take over an hour and a half in traffic, but that is my choice to stay far out of the city. Also bear in mind that you will need to pay for electricity and take your laundry to a laundromat for longer stays, which will increase your monthly cost by about R1000.
Overall, I would highly recommend staying here if you can afford it and either don't mind commuting the 50km into town, or if you will be holidaying / working in the area.