I just returned from Disney and flew down on airtrain and came back on Southwest and even though I had absolutely no problems with southwest and was even given an "A" boarding pass thanks to the check in people at the contemporary since we were having dinner at Chef MIckeys and went down and asked if they would print them since I was at my 24 hour check in time. And they did even though I was not staying there! ( thank you!!) I just have to say that I prefer airtrain! The plane was much much quieter! We were basically in the same section going down and comming back,, but airtrain was much quieter and they took off early once they realized everyone was there! Would I fly southwest again yes, especailly with the ding fairs,, but airtrain is a much quieter ride and a nice clean plane .And you have to love the option of getting your seat at 24 hours, versus "praying for a A boarding pass........ IMO.......So, if you have doubts,,, please give airtrain a chance...