This is literally the worst system I've ever seen. Booked one last weekend only to find out at the time zone calculation I did was wrong and I booked it for 2 am instead. Because no where are time zones mentioned. Tried to reschedule it this week and can't reschedule it until 5:00 am my time. Meanwhile, the slot I'm cancelling out of will go to waste, when someone else could have used it.