I've done it a couple of times but not the whole route. I've picked it up on the way back gone into Tuscany and then up to Brescia for the finish. Last year it included Modena. It's a petrol head's feast.
Two year's ago I stayed at a small hotel where some of the competitors were staying - it's odd parking your hired Alfa next to Bugatti's and Bentley's. You wouldn't like it - fine cars, sunshine, good food and wine and lots of pretty girls.
The start in Brescia is something I'd like to see and I'd like to do the whole route but it's difficult to get an entry ....