I'm planning on flying from MSP-CLT next Spring when I saw an AA first class seat rt in the $600s and I'm tempted to jump on it. Having never done first class on one of the major airlines (I was upgraded on AirTran once), the allure's still there for me a bit, but given it's not international/LAX-JFK, is it still worth the extra cost, or am I better off in economy given the flight length?