I came in at entrance T and witnessed mostly people unable to handle the new technology. I work day to day with this type of stuff and most people either do not have the app open, face the LCD screen towards the reader or just wave it at the reader. The NFC chip in your phone is on the rear and it takes a second or two to work. I watched one guy for a whole two minutes trying to get in, the staff couldn't help him either. In the end they asked him to step aside so others could get in, all to see him repeat the process a few minutes later. I would like to think City would have tested this extensively with the public before implementing it, I would recommend at least 30% more turnstiles would be required to match the speed you could get in with a seasoncard. There's nothing wrong with the technology as long as you know how to use it, if you don't it can be a nightmare!