Pianists-rate the difficulty of Appionata ? ..?

I learnt the appasionata ages ago when I was still a child, and couldn't play anything else challenging. It's not hard to play mediocrely - but it is VERY hard to play fast, and convincingly. By all means, have a go and see how far you get - but don't get too depressed if it beats you, it's still quite an advanced piece of music.