Never had any real problems on any airlines I have taken, except one for an emergency late night flight to get home from a ship that had pod problems, and they did the best they could to get thousands home at the last minute. I did have a bad time once on Delta. My husband wanted us to go to Las Vegas, and I had a blood clot in my leg so didn't think I could go. My hubby already had his ticket and was ready to go...of course I told him to go, and then my doctor said I could go if I wore the medical stockings and got up and walked around in the plane. It was a superficial clot and not in the deep vein. So I booked at the last minute and had to book 1st class and sit up there alone. Hubby was in the back of the plane. When we boarded the plane we separated and went to our seats. I had also paid for a aisle seat to be able to walk around a bit. I looked for my seat and there were two men sitting in there, and they were talking to the stewardess. I mentioned to the stewardess that the aisle seat was mine. She just said these men wanted to sit together. I showed her my seat number and all, and she just ignored me. Then she just said again that they wanted to sit together. I told her that my doctor wanted me to be able to get up and walk when I could and I had a clot and I had paid for this seat...she still ignored me...I really didn't know what to do, and I'm not one to make an issue of things, especially on a plane. A man across from me heard what was going on and offered me his aisle seat. I said I shouldn't be taking his seat but he insisted that I do, so that's what I did. He moved in to the window seat. I had never had something like this happen before and I was not happy about it. I had to pay a lot of money for 1st class because everything else was full because I had to get my ticket at the last minute. I should have written to Delta, I know now, but, I always said that I would never fly Delta again...of course I may have to since it is the major airlines out of Minneapolis. Have never heard any problems with their flights and timing and all, but, they sure need to train their stewardess' that if someone pays for their seat they should be able to get it.