Just flew on an A321 in an exit row. As best I could tell the seat didn't recline, but I was comfortable the entire 2 hour flight. I had just flown on a WN 733 a few days before (so older more padded seats) on the same route and also exit row and didn't find the slimline seat any more uncomfortable. There is an obscene amount of legroom in the row 13 exit row on the A321. We could've stood around and had a conversation.