Anyone have any experience or seen this line of solar cell equipped back packs?

I took a quick look at one of them yesterday, they seem like a pretty well made bag that includes a solar cell array that is hooked up to a cigarette lighter type of plug into which you can plug 12v rechargeable devices, ie, cell phones, ipods, etc.

They're not the cheapest pack around but I was intrigued with the notion.

Anyone have an opinion?

I was thinking for use as an EDC bag for the more urban among us it might be pretty handy.

John E