I'm currently an XS Drive user but i have a Epson P-4000 on order after testing one for a recent event i shot.
The P-2000 was great and P-4000 has just improved on that. I find that if i am shooting an event i can download my cards to the P4000 and use it to show clients the photos and take orders on the spot. It is much easier than carrying around a laptop. With the P4000 i can pop it in my pocket and download while shooting onto my other cards.
For aviation i have no need to use this device at all. When at my local i will have enough room on my 6-8GB of CF cards. Or on a trip i will always have my laptop.
I would really ask yourself if you need this device when you are shooting at the airport? A 2GB CF card is only £75 for a Sandisk Ultra II
5D2/7D/1D2(soon to be a 1Dx) 17-40L/24-105L/70-200F2.8L/100-400L/24F1.4LII/50F1.2L/85F1.2LII