I will not be pissed because that is announced and I know it's happening.
I was annoyed now because it was around a 5 hour window ... time enough for them to send e-mail regarding problems, I have my phone always with me and it's checking for emails regulary, and while I'm at home I check for e-mails regulary.
Edit: Also didn't they learend their lesson with Destiny Beta? I'm paying for Playstation plus and there are always problems going on, I do not mind sheduled maintenance but I except a better service when I need to pay for it.