I think the reviews don't paint the full picture. According to the Ampy team less than 2% of customers have any complaints. [1] so you're probaly only reading the super disgruntled. It's likely they just got defective devices. I'm sure these sourcing kinks will be smoothed over for version two of the Ampy Move charger.

They were just featured in the NYTimes: http://www.nytimes.com/2016/05/12/technology/personaltech/fi...

[1] http://dailynorthwestern.com/2016/02/18/campus/northwestern-...