If you are going to place a large order with Fasttech, break it up into smaller orders. Keep batteries, even MVP/ego types totally separate from everything else. Same with juice. There is a history of major problems with the Hong Kong and other China postal services and the shipment of batteries and juice. Do not place one or two large orders. Do break it up so if one gets lost or held at Customs or returned by Customs to Fasttech, you other stuff gets to you.
If it says Kanger, it is Kanger. If it says Kanger style, or Kayfun style, it is a clone. The clones can be hit or miss. Lots of clones. The huge Fasttech thread used to be real good on letting people know what is a good battery, clearo, replacement heads, clone Kayfun. Lots of talk lately of clone mechs so you will need to search the thread.
Also, do a different order for something that is out of stock for 5 days and group by what is available to ship now. Make sure, no matter what, that you get a method of shipping that has tracking. If you have to pay a buck or two more for it, do it. Saves headaches later if something goes amiss. And take pictures of the package when it arrives and what the items look like. Lots of packages go through a hard, rough journey to get here. Fasttech wants pictures for returns.