The BLKBOX 12W Portable Folding Kit looks and sounds good on paper, and that's not to say there is anything wrong with it. It worked reliably and gave us no glitching grief, but when we stacked it up against the competition, we were disappointed. It was heavier and bulkier than some panels that boasted more power, like the Instapark Mercury 10.
It also only had one USB port and an undersized storage pocket. We did, however, like their idea to put the USB port on a cable, which we feel adds some charging flexibility and reduces strain on the electrical connection.