mini cnc router for hobby RZ6012B router table

Razortek mini cnc router for hobby RZ6012B router table  
How to choose a good cnc from china? 

Some buyer is first time to buy machine from china, there are lots manufacturer in china,price is different, so it is hard to choose a good machine.
here give you some advice .
1. check the machine design and configuration first. even all chinese machine use similar machine parts, but some supplier write the configuration simply .do not mentioned the model and brand.
check the machine really working video and pictures. you can see frame,painting and others.
2.check the suppliers' reputation. whether they have sold same or similar machine to my country ? what is the scale of the factory? 
3. chat with the seller,whether the seller is reliable. some seller is professional,some are utilitarian.they only care about the order, do not listen what you need,
4.service after sale. this is important. becasue every machine has the risk to repair when using. so if the machine stop. who can help you ?