This app was working well until recently. Now I find that I cannot book a class either without waiting for some time - 30 mins plus? or even at all on occasion. The venue concerned says there is nothing they can do - it is a fault with the app. What does appear to be happening is that the app does work for those customers who are booking on an iPhone but not for those using an Android like a Samsung Smartphone. This is a bug that needs fixing. I uninstalled/reinstalled but no improvement.