Flew Phuket to Chiang Mai, and got dinged nearly $60 CAD ($55 US) for a 20 kg bag. When I picked myself up off the floor, I asked the desk person if I could avoid this sticker shock on my return flight. Told to go to the website, check in online, and 'pre-register' my bag online. The savings would be 'significant'. So today, I did just that. Only problem - when it came to registering the bag, the website froze me out - even after multiple attempts. Simply couldn't register the bag, let alone pay a lower fee for it. When we got to the airport, I explained the situation. We had checked in online, so it was clear I wasn't pulling anyone's leg about trying to get things done on the website. But the check in person gave me the cow in a pasture stare, and charged me full freight for the bag again. I explained again it wasn't my fault - I'd tried to do what her colleague had recommended - but their website wasn't working. I then told my story to the person who took my money. Same look. So watch out! Bag charges are exorbitant, and going online to lessen the charge brings no joy.