I reckon the best thing about the Arco region is the public transport. An excellent bus network services all of the valleys for around 1-2 euros a trip. And the tourist info staff are very helpful. If you tell them where you want to get to they will tell you which bus to get, where to catch it and give you a map and timetable. We had a rental car but it never left the garage in the 2 weeks we were there. Climbed a lot of sport routes from single pitch to 300m and never climbed harder than 18/19. I wouldn’t particularly rave about the quality of the cliffs and climbing but the whole area is very attractive and the locals friendly. As it is a major outdoor activities centre there are a lot of well developed via ferratas, mountain bike tracks and hiking trails within easy reach.