A1-12 is just like business for United, Delta, or American. Seats have more leg room, more seat room, and are spaced differently than those behind them. Why do you not know or realize this? I flew on Delta first class because it was the only seat left when booking and I had way more space than I needed. Had plenty of leg room, a pull out table, and I got offered drinks before the flight pushed back and the seat was angled in a slight reclined position. Very comfortable. All of this depends on aircraft type as well. Long hauls are obviously built for comfort. This was a small E-175 for a 40 minute flight from Boston to NYC, so the comfort was different but still comfortable.