Delta's seating programme is very good. I sat in 10J in their Eco Comfort section on their A330. The legroom was spacious and the seat recline generous. The seat was very comfortable. I slept for several hours. The food has improved as well. They also give you an amenity kit that contains, ear plugs, eye shades and a toothbrush with tooth paste. Overall, a very good experience. The service level is equal to a European carrer.