Taking a cog train is the best way to see this site, but only go when you know the weather is good. Views are spectacular from the train and even more so when you arrive at the top. Take the walks to see even more fabulous views. The trails are plenty wide, but could be an issue for some. We had a pleasant snack in the café if you are a bit hungry.
Note: the rail was being worked on when we went, so we took the train about half way, switched to a bus, and then back on the train to finish the ride. A bit annoying, but still worth taking the trip.