I bought a preferred seat - the flight wasn’t full and I was hoping to have my wife join me in my exit row. She also had purchased a preferred exit row seat. A large guy from the sears behind asked for and was given - free of charge - the aisle seat that I was going to ask the attendent to give to my wife who was in an exit row with 3 people in it. a buy irritating that this person got the preferred seating without paying - as my wife and I had! Other than that, the flight was fine.