We didn't have any issues early in the day, later in the day it was difficult to log in but once you got there it worked.
While it's annoying that a system is down, I have to say that there weren't any, from what I can see at least, data leaks or total meltdown issues. So the service was overloaded and everyone is mad, not saying they should be happy but other providers have had melt downs in the past and start sharing account information with the wrong people and all sorts of erroneous things. Even today I am still having issues logging in, but once in everything seems to work okay, and everything looks correct so it's a bit meh. We are in the lower 12% of earners and were fine so I find it odd so many people struggle to cope for a few hours.