I placed a couple of orders with them and as mentioned the shipping was around $15 and it took about a week to come to the US.
The 510 products I ordered were excellent and still going after over a year. The generic batteries I ordered to replace my junk form the start Intellicig EVO batteries were again, junk. Of the two I ordered, one gave me a single vape and died, the other didn't work at all.
HC did say I could return them, but it just wasn't cost effective.
If you order a good reliable product from them and order enough, they are a very good deal. They were, at the time anyway, the best price by far I found for my 510.