My first encounter with CameraKing wasn't great, and that was for some Hoya CPLs.
52mm and 58mm.
I ordered the two, very good price. But, they took 3 days for them to despatch the item, which is very slow in my opinion, and the parcel still turned up 2 days late. Which says to me that they weren't dispatched when they said they were. But, nevertheless, I was happy to receive them. Ran in to the house after work, opened up the parcel only to find the 58mm filter missing. So I emailed them and they simply replied with "Sorry we've got none in stock, we'll refund you the order, it will take 3-7 days".
Why on Earth they said they dispatched both items is beyond me, and their communication skills are terrible. A simple email would have suited me fine and I could of looked elsewhere.
I'd recommend using someone else.