Interesting how these things show up on the market as pretty much the same device, different brands, with small differences in features. I wonder if it's some kind of competition thing between different Chinese factories. The one I have came from Woot last September:
It was $60, which is a lot more than $35, BUT mine is 12A, 150% of this one which is 8A. That's a big difference. And mine came with another accessory cord with 8 adapters for various laptops, and it will produce enough current to run a big 17.3" inch screen i7 laptop for more than two hours. So, I say thumbs up to these gadgets overall, and this one is lighter duty than mine but it's also a lot cheaper.