Spirit Airlines- Good value, nothing much to rave about, but its great for travelling light from "A to B". I didn't have any issues with them regarding service- I knew I would be in for a basic economy service. The tray table was hilariously pathetic! Cabin was nice modern & clean, found them comfortable for a 2hr flight.
DFW- TSA was a little slow, but the time of day would coincide with the early morning rush, but once through it was easy to navigate around!
LGA- No issues with the airport, got straight on the bus and after getting to the nearest Metro station I made my way to JFK. Didn't have time to really experience it, better luck next time.