I paid for Priority Boarding from Alicante, Spain back to the the UK. The only priority you get is in the aiport terminal, boarding first from the gate descending to the ground floor level, where you wait for the bus to collect passengers to take them over the airport tarmac to the aircraft. After that is a free for all.
When the first bus drops the passengers off, opening it's doors, all the passengers including, priority and non priority get off (get off is polite - actually shove and push). Then a rush to the plane steps. Depending on who runs fastest to the aircraft steps resulted in who boarded first. When I boarded I mentioned this to the crew who informed me it happens all the time and to complain on my return. I will be and I'm going to request a refund.
There was a poor Spanish family with 3 young children, twins and toddler, who by the time they had got off the coach, dodged the rush, put the buggies down and boarded were at the back, wondering why they had bothered to pay the extra for priority boarding. Poor things.
To top it all a group of drunk passengers (outbound and inbound), no Ryanair flight is complete without them it appears. I have not encountered the same level of acceptance towards drunk passengers on other airlines. The drunk swearing doesn't make it a very family friendly flight. Take earplugs for the kids if you are flying with them. I won't be using Ryanair again.