At $80 the box said it would give you up to 2hrs talktime. Hmmm on the HTC it would be lucky to give you 30mins. And despite saying it would work with your iPod and iPhone it was definitely not combatible with iPhone 4. The employee said it worked on his dad's iPhone 3 though. On a bright note, DSE were great and despite it being over their normal 2wk return for refund policy they refunded me in full.
So I thought I would share this info (so you do not rush out and buy one) and also ask if anyone has had a better experience with other solar powered phone charging options?