In reply to Matt Smith:
Cragging: up to 6a pretty polished. I don't go to Arco for the single pitch sport routes any more.
Multi-pitch: I love it!
I think that the better quality routes are the traditional ones in the Diego Filippi guide, such as the Via del Missile (VI+) (VI+) on Monte Casale https://www.bergsteigen.com/touren/klettern/via-del-missile-monte-casale/ or Cesare Levis (VI+) (VI+) on the Pian dela Paia https://www.bergsteigen.com/touren/klettern/cesare-levis-diedro-manolo/ . Here you have natural lines on good rock with a minimum of vegetation.
I am not mad about the Placche Zebrata / Sonnenplatten. I have done Teresa (5c) (VI?), and it's fun because it's fairly long (15(?) pitches and about 400 m), but I wasn't so keen on the climbing itself.
I really enjoy the modern bolted routes, equipped mainly by Heinz Grill, described in the guide Arco Plaisir. These are on second tier crags which I guess would have been overlooked as uninspiring at the time when routes such as Via del Missile above were getting discovered. There is a lot more vegetation on these Grill routes and they are more of an attempt to find a climbable line through a mixture of trees, rock and other stuff. However... there are often some really good pitches. For example, the Helena (VI) on Monte Colt - Parete di San Paolo Nord offers an overhang at grade VI that looks wild but turns out to feel like a 5b overhang at the wall. The Molinei Piramide Lakshmi also has two really good routes at VI / VI+.
I don't think much of Piccolo Dain. (Sorry Toerag.) Too much wandering through low-grade grass and stepped rock.
My recommendation for three days in Arco: skip the cragging and probably skip the VF Do one or other of Via del Missile or Cesare Levis (take a rack), and then, for example, the Via Helena above and one of the grade VI routes on Piramide Lakshmi. Or just maybe Via Teresa on the Placche Zebrata if you want to have climbed there at least once.
Other recommendations: coffee on the main square in Arco (big cappucino is my favourite), ice cream, and in the evening pizza and Campari Spritz. It's busy and touristy, but I still love it there
Post edited at 08:52