Chinese Android Phones Legit?

So I've come across some Android devices that are sold in China that offer, at least on paper, some legit specs. Stock Android, IPS panels, low prices. Is there a catch here? I've watched some videos online of people in Europe saying good things about these phones. I'm referring to companies like Zopo (ZP950 pictured below) and Cubot and THL. (Not Huawei.)

I realize these phones can't do more than 3G data in the States but at these prices I'm seriously considering one. Anyone have some experience to advise me to purchase or stay away?