Good that you did your homework and researched what you were going to buy and where you were going to buy it from. Too bad a lot of people don't do this and are sucked-into the flashy marketing, websites video and cheap pricing on both chicom and a few US-based vendors.  These places are quick to take your money and then go silent or give you the runaround when problems occur.
There are a lot of good US-based and a few chicom vendors who provide good service but there too many bad ones as well.