Buy your seats if you must. We chose badly not to pay for seating. We got split up on 2 flights and crammed against the bulkhead on the late flight home (at least we were together) smelling the potty, and had a crying coughing baby about 3 rows up. I must admit it was most entertaining just before landing - gear going down, with the stewardess pounding on the bathroom door telling the guy he had to get out so we could land! He never did come out, so we landed with him in there. Hubby and I were chuckling over that. Bulkhead seats do NOT lay back so sleeping was tough. Crew was professional. Bumpy weather and higher flying than expected caused a need for extra fuel. We got home safe but delays did happen so we were 20 minutes or so late, not too bad considering that trained pilots are running a bit short these days. Got in about 1:30 am and got our luggage pretty quickly. Advise you have a ride waiting for you if possible, DIA-train is not reliable, and does not connect at all hours to other trains.