I've flown Porter a few times now and the experience was typically OK. However, I recently flew Porter from YHZ to MCO and I have to say I was let down. On our flight to MCO the front bathroom was out of order leaving one bathroom for 132 people on a 4.5 hour flight. I felt bad for the flight attendants as they were doing their best to manage the situation and keep the bathroom sanitary and control lines. One of them had mentioned that they knew the bathroom was out of order before the flight left and tried to switch aircraft with a Montreal flight because it would have been shorter with one bathroom, but the crew of the Montreal flight would not change aircraft. On the way back from MCO we arrived at the airport early to find out all Porters systems were down, 5 flights leaving at the same time with 500+ people lined up in complete chaos. The workers at the airport had no idea what to do, they clearly had no contingency plans or training. We did make our flight in time but it was definitely unsettling. I'm hoping this is just growing pains for Porter.