My last few flights have been southwest, and one on American, and I ONLY flew American, b/c they had the cheapest/only non-stop on the route i typically fly, From either Dayton, or Columbus OH to Dallas. (I'll be SOO glad when the wright amendment expires...next year i think... and flights out of Love field won't be limited to states contiguous to TX) If i can get a Direct SW Flight, it's game over for the competitors. (right now American has 2 flights daily from DAY-DFW. all on MD80's (2 seats one side, 3 on the other) and they are ALWAYS FULL flights.)
the only time i've had an issue with SW, it was "an act of God". I had a stop over in orlando, and they had a strong storm cell come through the area(w/ tornadoes even!) after we landed, we sat on the tarmac (in the plane) for an hour waiting for the storm to let up enough for the airport to re-open. then they re assigned my flight, (I wasn't supposed to change planes there, but ended up doing so)but my Luggage Didn't get reassigned. I made it in to Boise 2 hrs late(12:30a, EVERYTHING in the airport was closed, even the rental agencies, Luckily i was meeting My parents there, and they had gotten in in time to pick up the car), and no Luggage (turned out it went to Chicago, i had a funeral the next morning) My bags made it to me after the funeral, and they reimbursed me for clothing expenses up to $50 (Hello Walmart!) then, a couple days later, i Got a $70 Voucher for my troubles in my email(as did everyone on my flight into Orlando)