Shenzhen has taken many pages out of the Macdonalds & Walmart blueprint; make something cheap, fast and easy and most people will gladly overlook certain aspects of quality/craftsmanship and/or general health concerns.
However, for the smoker and/or new user, I believe its the only market available and I have nothing but good things to say about products like the Endura, Nautilus, and even ego's and CE4's. They serve their purpose and they work.
Clones vs authentics, well, my take has always been you get what you can get, and if you like it, you like it. Just don't get in someone's face to tell them how dumb they are for buying authentics, or how smart you are for getting a copy for a fraction of the price or look down on someone else who cant afford the real deal.
For me, I'm at the end, and well over the vaping craze, so settled down with exactly what I like and very particular with how and when I vape. Since vaping is a personal thing for me, I want something carefully designed and built exceptionally well by the same person, not something put together by hundreds of people off a conveyor belt.