The Camera is at the very top of the building, about 5 flights up with no other access, and we were fortunate to see through it on a lovely day. (When it rains hard or is foggy there is not much to see.) There is a walkway outside on the roof that gives great views over the rooftops of old Edinburgh.
We opted to start at the top and work our way down. We all enjoyed ourselves, though it took me a wee while to regain my balance once we were done :)