It's always down. This is particularly true on results day, where you will be stuck, desperately trying to log in, and receiving the same, endless error message. It will also happen on the day you have to apply for next year's modules. Like a good student, you will have woken up an hour before the application page went live, only to find yourself automatically logged out with one minute to spare, and desperately trying to get in before all the good modules are taken. And when it is working, chances are that it will demand that you change your password yet again.