Horrible experience. SEA-OGG and back and was severely harassed for trying to use my common Graco infant car seat to keep my baby safe in flight (the airline approval sticker was partially ripped off however you could clearly see it was airline approved). Once they finally said I could use it I was not allowed to use the car seat correctly (rear-facing) as they said it would not allow the person in front of it to recline their seat. Never mind that there were very many empty seats on this flight they could have moved this person to including the empty seat next to him if it had bothered him. Then was harassed because they assumed I had not purchased a seat for my infant when in fact I had and was required to show my tickets to them. Again despite having at least 8 empty seats within four rows of the seat I was in - it was a very empty flight. I fly often and have never experienced such horrible customer service.