I have ordered from them before on a miriad of products.
Cheap, sometimes product is below par. Takes 2-3 weeks shipping. Had to do a return once and it spanned a few days of back and forth emails for info, gave me a Miami address to send my return to, then another 2-3 weeks for new product to arrive.
Some deals are worth savings, some maybe not. I know with their flashlights sometimes you get a dud. Personally I would not hesitate to order from them due to the savings with their low cost but I wouldn't bother with e-cig products.
I saw a US supplier recently that had disposable 510's for $11 with free shipping, limit of two and it came with a charger. Supposed to give a few recharges of use, but for the life of me I cannot find it again. That sucks as a friend of mine wanted to order them to give it a try and I wanted one as a backup.