I think they are reputable. I placed an order on Jul 2. Standard shipping which seemed so cheap! My order is still sitting in customs in China. Even if it was approved tonight, put on a plane, I wouldnt expect to see it for at least another 5 to 6 days. I dont know if DHL can get the goods state side any faster.
I picked up various clearomizers, drip tips and stuff I can live without for a while. Except for a usb charger that I needed a few days ago lol
Edit: In case you do order, I found the following information regarding China Air Mail status...
1. "Posting" - Your package has left DX and it is in China Post
2. "Arrival at transit office of exchange" - Your package is in the outward custom´s
3. "Departure from outward office of exchange" - Your package is waiting for a plane, already accepted by customs
4. "Held by Customs" - Your package is in your country, and in Customs.
5. "Arrival at inward office of exchange" - Your package is now in your own country post.
6. "Final delivery" - Now you have received your package.