G Bart D.wrote a review of Goal Zero Guide 10 Plus Adventure Kit on May 10, 2012
Recently took it out on 5 day AT hike. Had an assortment of devices including iphone, camera, ipod just to see. Conditions were sunny to overcast. On overcast days it still generated a good charge. Set it up on top of the pack and let it rip. Charged an iphone from dry to full in 4 hrs in sunny conditions. When not charging the individual items then the battery was plugged in to charge. I was impressed and felt confident not taking xtra batteries/Mophie etc. Relatively compact, 1 lb was nothing to add to the rest of the gear and I used some new GPS apps with reckless abandon. I think it is as good as advertised.