I really haven't seen or heard of any Chinese devices take off in the US yet. Even larger manufacturers like Huawei are struggling to gain a real foothold in the US, despite their low priced upper mid range devices. I think there are still too many questions & concerns involved and people are hesitant to make the commitment, even at a 200 dollar price point. You "read" about folks being interested, but nobody really ever follows through. (At least that I know of) Personally, I think its going to take a lot more than an inexpensive device to covert people.
Just my 2 cents.
S5 tap'n