Hey @edi for the hotspoting and the payment options. Yes, it does work, i havent tried it on linux yet. But if the controller does go down or can i say the unifi looses the connection to the controller and can still get to the router. You basically have a free and open network, which is and can be nasty… it seems to be a ubiquiti thing. Paypal works I have implemented it and it works like a dream.