I currently have one of those in my pocket right now. Hinderer assisted knives are great, I've never had a bad one. It's the perfect balance of quality, usability, and cost for when I inevitably lose it.
Kershaw's customer support is ridiculously good too. I broke my belt clip, admitted to them that I did something stupid to break it, was offering to pay for a new one and shipping, and they shipped me a free one anyway, new screws and all. They didn't ask to see a receipt, or try to pull some BS about it being purchased from a third-party vendor. I've owned about a dozen different Kershaw knives, across their price range, and never had an issue with any of them.
For $19.99, I don't think you could buy a better folding knife.