If your checkin luggage is over the limit, they are very assiduous about charging you (healthily) for the overage, and you have to go to a different location, stand in a line, pay the overage, and then go back to your checkin counter and get your boarding pass (but go directly to the agent, don't get back in line). It can be very time-consuming.

Some airports also have compulsory "security" wrapping at a an additional fee. More time wasting.

If I had but one bit of advice, it would be:

DON'T SIT NEAR THE TOILETS!! You will be aware of their presence as soon as you board the aircraft, but if you have the misfortune to sit close to them, be prepared to breathe through your mouth a lot ....

HTF