It goes for most rip off stuff indeed; and not only that. The white label companies ship stuff which is simply unusable as you say. You have to be a hacker/modder to make it work. Which then actually works fine for the price. Out of the box however it's pure crap. If it has a custom OS (not android/linux) then you really need to look out; Android usually is already bad with the wrong/non working drivers etc, but when they made something themselves it's usually so bad that you cannot use it at all.

It's stuff to experiment with to try out different cases and such, but for real day to day use, you would not buy it.