IMO if you are a tunnel offering free vacs and have attendants on site while your open then the clogging is not a concern because the worker bees can check and fix couple times a day. Customers are not losing money. If you have an unattended SS like most of us do with paid vacs the clogging will lead to loss of customers and vandalism. THEY CLOG CONSTANTLY. Does not matter what manufacture it is. If you want to get calls everyday about someone losing a dollar and constantly pull out the ladder then go for it. Sure they look nice but what good is that if they dont work. Ive never heard a customer say there is no suction but it least they look nice. Arch vacs are like seeing a beautiful hooker. She looks amazing from the outside but the inside will burn you lol