Unfortunately, JetBlue has been a lot higher than Song for us for the last couple of trips. And we love JetBlue. I even have a $300 credit that I might wind up losing if I don't use it soon. We were hoping to fly them from Boston to MCO for President's Week, but Song came in hundreds of dollars cheaper (for 5 rt tickets) even counting in the $300 credit that I added to the cost of our tickets. I just couldn't justify flying JetBlue for that. So we are going with Song and all their flight switching. As long as I get a direct flight, the times don't really bother me.
I'm always keeping my eyes open for a quick trip on JetBlue so I can use the credit.
HeatherC