I flew from SFO to GDL on United Airlines on the redeye on Sunday AM. It was the worst flight I've ever had. I had a wheelchair to get to the plane, then walked to my seat. I was in an aisle seat beside 2 obese men who spilled over into my seat. Seats were extremely small and rows were close together. The FAs were rude and surly, wouldn't let me change seats despite letting someone else change. LCC service (charged for food, pay video with DirectTV) with full-service fare. In the future I will avoid United if at all possible.