The J seats are among the best on flts today. They are 180-degree lie flat bads. It is "herring bone" layout, like the bones of a fish. It is 1-2-1 starting at row 8 to row 16 (no row 13). There are 32 seats in J. A and K are windows and I don't recall aisle seats.

I definitely recommend the windows as they are window aisle seats. You get limited view because of the layout but the personal space is decent. 16 A and K are close to economy and can be a little noisy and also some jockeying while getting out of the aircraft. 8 A and K are close to the galley and bathrooms. The best are 9 to 15 A and K. There are no bad seats in my opinion. I flew about 6 segments in these new planes in J class and recommend them over most carriers.