I should mention that I bought the Matone on October 24, 2015, so we're talking about a two year trial period, and it's still going strong. I can't guarantee they still have the same quality, and based on some of the reviews, they may have sourced this from different suppliers, with some suppliers having higher QC than others. But it is the exact same product listing on Amazon now as it was two years ago, and a few bucks cheaper now. A similar solar charger I bought earlier for nearly 100 bucks didn't last but a few months. What is interesting is that some of the recent reviews of the Matone mention problems I had with the more expensive solar charger, but have not had with the Matone. So this is probably like the cheap flashlights where you have multiple companies buying from multiple factories in China, and it's a crap shoot whether you get a good one or not, no matter what "brand" you get.
Interestingly, some reviews of solar chargers say they got warped from being in the sun. But since the Matone stays on the dashboard, which is like a solar oven sometimes, and had never warped or shown any sign of damage from the heat, it is apparently made to take the heat.
Here are some of the reviews for that triple panel X Dragon solar charger:
The item being charged also has to sit in the sun. After being in the sun the solar panels warped as well.
Bought this for a camping trip, the first few times we used it, it charged 2 devices perfectly. After that, even though we left it alone in the sun for a while, it never quite worked again. Kind of wish I had my money back.
This solar panel was good at first, but after using it a few days in the sun the plastic got weak and melted and is now bent and I can not get the first panel back to its original form.
product warps and distorts in the sun! kinda funny when you think about it. i would not recommend this product