We spent 3 nights here, our first visit to Cape Town, and loved it. Constantia is a great location for exploring the Cape area. There are some great restaurants in the area - Beau Constantia, Steenberg - and while a car is advisable, Uber is very good too.
The apartment is spacious and comfortable, and well equipped. It was perfect for our needs. Issy, the cleaner, was charming and made us feel very welcome. There was occasional noise from the owners' dogs and the road, but this wasn't a major issue.
We would definitely recommend it and would happily stay there again. Next time, I'd like to make more use of the swimming pool which didn't happen this time as we spent all day sightseeing!