Portable Solar Panels. Do you use/thought about some?

I was in Costco today and was looking at some good deals on some portable solar panels for some power while out/camping. I've seen a few builds with some people that use them for this reason but never really seen any feedback on some. I'm not a huge electronics person but for some small things while out, i feel it would be a nice setup. Anybody with any knowledge, experience with some? I was talking to the sales rep about some Goal Zero panels today. Some of them like this one i found on Amazon

Goal Zero Nomad 20 Solar Panel

http://www.amazon.com/Goal-Zero-120...TF8&qid=1446602756&sr=8-14&keywords=goal+zero
(Listed as $199) Were running a special at Costco for $99 w/ free recharge batteries.


http://www.goalzero.com/?ims=brand&utm_campaign=Brand+Search&utm_source=google&utm_medium=cpc&utm_content=brand&utm_term=goal zero&gclid=Cj0KEQiA0-GxBRDWsePx0pPtp4sBEiQACuTLNhu6uAxof3HU3WnPnvLmWxc2p5zxRLVvbCfFOfAqxUkaAioZ8P8HAQ

 

My buddy has a set like that, same company. He set the panel in the window while we were at an event and it charged his phone on the way home. We've also gone hiking, he'll throw it over the top of his pack and it works great.

 

I use Goal Zero