@Vgore0304 Absolutely do that. I just had a six hour flight for work, and my company would only pay for a basic coach seat. It's physically exhausting/slightly painful after about hour 3, especially if you're in the middle seat.
@FaeLuna @vgore0304 Yes, good luck. I've done 16 hours and that was tough. An aisle seat helps so you can easily get up and stretch, stand in back for awhile, keep your blood flowing.