The only bad experience we have had so far was travelling with Air France. We had a lovely short break at Disneyland Paris but the airport experience on the way home was a nightmare. The staff were rude, shoving us from departure point to departure point, they cocked up and shoved us about like cattle. Eventually when my dad questioned how long this was going to go on for he was told to "shut up and get out of the airport" - so charming! We laugh about it now, but actually we've never experienced treatment like that before and I'm afraid it sticks with you.