Just did this over the weekend.
LGA - DFW on 6/29 was delayed by almost 5 hours, derailing my plan to visit the AA museum near DFW. The aircraft appeared to have arrived in LGA the prior night, so I'm not sure what happened. Maybe crew time out issues. When I asked the crew, they said they didn't know. Thankfully I got an email the night before the flight notifying me of the delay, so I didn't waste time at the airport.
LGA -> DFW Outbound Flight
LGA was the usual dump, though I did see some very new-looking buildings (haven't been there in years). I decided to cheap out and take the M60 bus to the airport. $2.75! Security was quick with TSA Pre and boarding was orderly.
The A220 is quite impressive. The aircraft was impeccably clean. Very big windows for a regional; possibly bigger than even 777. The engines were not as quiet as I'd read about, but still definitely quieter than a 737/A320. I wish they had a real bulkhead between F / Y.
I thought I got lucky as I had an empty seat 2C next to me. As soon as the door closed, though, the crew called someone up to the front from back in coach. Amusingly my new seatmate in 2C appeared to be a Bombardier employee - he was helping the flight crew operate the lighting controls before takeoff.
Seat 2D was the right choice over the bulkhead row (thanks salsa!). Legroom was good. The IFE screen was MASSIVE - at least 12 inches, probably more. Extremely responsive and a huge selection of movies (even a lot of Japanese movies, which I definitely didn't expect on a 3-hour US domestic flight! ). Watched "The Inventor" on the way to DFW.
Service was fairly good. However, there was one thing I noticed and I'm not really sure what to make of it. When the FA got to my row, I was offered lunch in the following manner: "Would you like to join us for lunch? I have a chicken Nicoise salad", implying that was the only choice. I had noted that she had offered a choice of beef tenderloin or the salad to the passengers in the row in front of me. I was not sure if they had run out of the beef already or if she was trying to get me to pick the salad because the beef was more popular. Maybe it wasn't intentional, but I never asked if there was another choice. In any case, I was not in the mood for beef (planned to have steak at the hotel) so I said sure. The salad was good!
The flight was smooth and arrived at DFW 5 hours behind schedule. Since I arrived in terminal E, I took the people mover to Terminal D.
Grand Hyatt DFW
Probably the nicest airport hotel I've stayed at. The lobby is discreetly tucked above Terminal D and very nice. The room was a runway view king, very spacious with a desk, day bed, and a huge bathroom with separate shower / tub. One negative I think would be that the tub was very shallow. Amenities were June Jacobs and pretty nice.
View from the room was absolutely fantastic, overlooking the entire length of runways 18L / 18R. I spent hours just staring out the window watching takeoffs / landings. Geeked out a bit with live ATC turned on. It was really cool to hear "American 123, cross runway 18L" and then immediately see a plane cross runway 18L! Also watching the operations made me realize how absolutely massive DFW airport is. There were two runways in view from my room and a third some distance away; and that was just half the airport!
The restaurant was overpriced but had a fairly good fillet steak there and the service was prompt and friendly.
Spent the morning watching some 777s/787s take off and land and an Asiana cargo 747 takeoff. Breakfast at the hotel restaurant was good but again overpriced.
DFW -> LGA
DFW TSA was also quick and efficient. There was a checkpoint literally 20 feet from the escalator leaving the hotel. However, there was a massive line for the regular TSA and a short line for TSA Pre as well. I then noticed a sign that said '3 minute walk to next checkpoint - 5 min regular wait, <2 min TSA Pre wait'. I walked less than 300 feet probably and sure enough, another checkpoint with absolutely zero line. I was through in 3 minutes. I thought it was funny that the airport is trying its absolutely hardest to let people know there is an empty checkpoint within a few minutes walk, yet people choose to line up at the most crowded one. Herd mentality I guess.
This flight boarded sharply on time, to the minute. This time I was in 2A. More or less the same seat. On this leg I was offered either a salad or beef sliders, and I chose the sliders. They were great! Service was friendly and efficient. Watched Disney's "Oceans". Pretty good but I think Blue Planet beats it. Had a great view of Manhattan on the LGA approach and a smooth landing. Then another $2.75 ride on the bus home.
Summary
All in all very nice aircraft. F seat probably not worth it if it's a high premium or for really short flights, but definitely made a bit of difference for a 3 hour (3.5-4 hour butt-in-seat) flight. I will try the economy / EC seat next time. Grand Hyatt DFW was great.