As of September 18, my order with BudCentral is still processing. He hasn't even read, let alone reply, to my messages; checking his profile shows that he has 40 unread messages total. I was told by his reddit PR rep Trappy_Pandora that it should ship today or tomorrow. If it doesn't I will be disputing it as I've seen many others on here having problems with BudCentral. If you plan to order from BC on Blue Sky wait, I will keep you posted.
As far as Zelta's Garden goes, I was getting worried with BC and his lack of communication so I decided last night to order with Zelta as well. My order with Zelta's Garden is already marked as shipped...as of the time of this posting. These are my first purchases from the DNM so I don't have much to compare their services with, but that is amazing shipping from Zelta.
I will update this post with a review of both vendors.
EDIT: Both vendors have marked the order as SHIPPED today (9/22). Will update with a complete and comprehensive review when orders arrive.
No clue about BC but zeltas is pretty solid, shipping was a bit on the slow side but stealth and product quality was nice.