Simple, I talk to my vendors and keeps very close working relationship with my suppliers. Period.
If you have met the boss yourself, you will know what sort of quality freak he is on his products and services. Period.
Their housebrand models is sitting just on the testbed table area. You will see various models not listed on VStarcam there when you visit their office. Not hard to know about their housebrand and talk to the right people.
Why VStarcam is trying too hard? Look at the complain on the eye4 web based super client and you will know. Do I need to say more? They seriously need to engage their partner to QC for them and listen. But at least, they are different from any other brands.