Color me 100% unimpressed. On the way to Copenhagen from Amsterdam, they lost our luggage. This is…read moreannoying but it happens. The bigger issue came upon our return where they instructed us to put our carry-ons on the scale. We've never been asked to weigh carry-ons before so we were confused. They informed us that the total combined weight of a carry on suitcase and a personal item(backpack, computer bag, purse, etc.) is 12kg per person. Our bags were about that each which left us both with an overweight bag. The cost to get our luggage home, $100 per bag. Imagine being on the other side of the world, being tired and trying to get home and being hit with this out of nowhere. The ticketing agent finally relented but not after thoroughly stressing us out. KLM is terrible and we will actively avoid flying with them. this was a partner flight with Delta and we will be passing our experience on to them since their standards are supposed to prevail on partner flights.