We did this as part of a private city tour. Our guide informed us that about 50% of her clients are able to go to the top, due to high winds and visibility issues. So, we lucked out. The ride up to the top is fantastic. I would highly recommend doing this as a full day excursion. We only had an hour to explore the top. Not long enough to hike the many and long trails- plan to do some walking. It is well worth it! It is quite chilly and extremely windy so I would wear long pants and bring a light jacket. Our guide advised us of this and she was right! We saw tourists walking around in shorts and high heels!! Unbelievable! No doubt they were cold.
The flora and fauna are spectacular and very unique- please be respective of them and stay on the trails. It was appalling to see how many tourists ignore the regulations.
We didn't have time to explore the cafe-would have been nice to before descending. The cable car is fast going up and going down. The longest part is waiting in line to go up.
This is a must see while in Capetown.