solar generator

I decided I needed a small solar generator to power low current devices while camping and at the BOL during construction. I was only looking at recharging cell phones, cameras, and occasionally an inflatable air mattress, etc...I looked at possibly purchasing something like the the GZ Yeti 150...

Has anyone done any research on, or has any experience with this particular product? It's a solar generator from a company called Solutions From Science. My husband found this link http://www.mysolarbackup.com/ and I'm trying to find out something about it, but I really haven't found any...