My husband has to rely on Uber to get him to his appointments on time. What is the point of booking a ride in advance only for it to be cancelled when the driver is due to arrive at 9am only to be told by the app there are no drivers available, when i checked at 7am the booking was confirmed. Couldn't book an Uber during the weekend for the same reason. App constantly errors with a message "Oops there has been an error ....". What's going on - this was a brilliant service but is now unreliable