I’m usually the cheap shopper. Price is a big issue for me, so in general it’s a price over quality thing for me. In the case of the PowerCore 20100, it was tad bit more than I wanted to spend, but after hearing so many good things about their products, I pulled the trigger and purchased it. Let me tell you, this thing is AMAZING! I have had it for a while now, and it just keeps going. The battery life is amazing. I can get about 6-7 full charges with just my phone alone. Throw in my kindle and I get 4 full phone charges and 2 full tablet charges. It takes minimal time to charge the pack, and when not in use it stays at full charge for months. And that’s my experience when I can get my hands on it. Having two teenage boys who use it on a regular basis speaks volumes on the durability of this charger. To my knowledge it has been dropped numerous times, used to no charge weekly, and even run over once. While it has been scratched up pretty bad, the case is still completely in tact and it still works like the day I got it in the mail. I think it’s safe to say it was 50 dollars very well spent. Any other charger would have been replaced a long time ago.