Since Subito Go was introduced in Winterthur, I've only been using it, or trying to. But now I've had the problem several times that the payment couldn't be made. TWINT is connected and the limits and credit are more than enough. You always have to transfer the purchase to a self-checkout, which is annoying. The feedback form in the app is a slap in the face for every customer. You have to enter your life before you can even describe the problem. Why doesn't that work? I have full reception with the Migros WLAN.