Shipping can take up to a month depending on when you order it as well....if you order getting close to Christmas or around Chinese new year you're going to wait way longer than usual.
I am repeating what others have said above but it's spot on...when I first started buying from them I just bought what I thought looked good and then I got the biggest waste of metal of a mech mod I've gotten out of everything...only mod I popped a protection circuit on a protected battery with back when we still used those, horrible threating, always loose, never a solid connection on anything....and if I had read the conversation about that mod I would have known that before I ever bought it....
Then I started reading and participating in their discussions on the website's forum, you learn there is a regular group there that buys and discusses everything and they will talk about whether an item is good or bad, and if they had to tinker with it or not to make it work right or if it was hopeless....
I got my first Nemesis clone from them there, it was the first brass one they came out with, and it was and still is one of the best mechs I've ever had it was like 20 bucks, and then I got the aluminum tubes from them for a few bucks and it worked even better, I gave it to a friend when he started getting more and more into vaping and a year and a half later it's still as good as the day I got it. As long as you're willing to wait for shipping and do a little homework reading on the website you can get some great deals at a great price. I buy the plastic windows for my Kayfun Lite Plus V2 there, yup the clone one's fit the authentic and better and cheaper than the authentic SM brand ones I've ordered in the past that were a waste of money...I seem to drop my kayfun once a month and pop it apart ruining the plastic threads....for me it's totally worth ordering every spare part I can from them....most of them time I can make the spare parts work on other brands with little to no effort and for pennies on the dollar.
Just thought I'd share my experience in a little detail to help put your mind at ease about shopping there...but if you need something in a hurry than order it from a stateside store just the same...happy shopping
Oh...I almost forgot....every year around November they put up their once a year Christmas coupon...that's when the wait times get long but it's definitely worth the wait to save even more on their already low price...and you can always cancel your order before it's ships or return or exchange something if you have a problem...yes it's a long process because of shipping but I've never had a problem doing it other than a test of patience