If you have the money, you should do it. It is about 60 euros if you do the round trip. But the view you'll get from that station is incredible. And the restaurant at the top isn't that expensive.
And if you are brave enough, you can go outside the station to walk a bit on the mountain :)
Vai a consultare la mia guida per le migliori cose gratuite da fare, nonché itinerari e consigli di viaggio per rendere il tuo viaggio indimenticabile.