I’ve been caught by this bag was the right size apart from about half the wheels had to pay to take it, they were strict on the weight too. Annoying thing is when you board you see people with bigger bags so it is a lottery depending on the check in person.
i use easyjet all the time now they are sensible so long as you aren’t taking the mick and there is no weight limit which is handy when you are coming back with mountains of heavy paperwork!