Today rented a car at avis, the rental fee was more than 300 euros, a Benz E series, because my friend said that buying insurance at the counter, if there is a problem, using this insurance will be more convenient. I said I wanted a higher grade insurance, but when the bill came out in the end, the insurance for 8 days was more than 400 euros, and I finally needed to pay more than 900 euros in total. Is this normal? If you continue to rent a car in the future, will it be okay to choose the super insurance on the app ? Italy Q&A