Looks like a nice alternative to the Powerfilm F15-600 I have especially for $45 less. I am curious to see how it holds up. It looks well built and stored in a Pelican Case I figure it should last you a while.

I am conteplating moving up to the F15-1200 which is 20w compared to the 10w i have now. The 600 charges my tablet pc, but it is slow going. I figure doubling the wattage should help.