Just a few observations: I've recently made a few orders from Vitacost because iherb was out of stuff I needed. Although overall cart cost is modestly more from Vitacost, there seems to be one major advantage. Orders from Iherb are taking longer and longer and longer to get to me. They ship from CA and I'm on the east coast. They've done away with the free 2 day air and have gone to supposed expedited shipping. They used to say if you ordered by 1PM PST M-F they'd ship that day. Last few orders have taken 3 or more days to ship! Then when they do ship, it is taking 7 to 9 days to get to me. Last order was expedited and the site claimed I would have in 3 business days. It was a total of 15 days from time I placed order until I received it. I asked them what was up and got a reply that they were sorry for the delay but that was it. So, over the last 6 or 8 months, I've been increasingly fed up with iherb.
So, Vitacost orders: Made both orders on a Saturday morning. By Sunday night, got notices shipping label had been created. Had packages by Tuesday evening. Yes, I'm in SC and Vitacost is out of NC but they are even processing their orders on the weekend! They send UPS Sunday night, it goes to the local post office on Monday and I get it in the mail on Tuesday. Can't complain about that. So, I may be using Vitacost more. If only they sold NOW Foods products. Has anyone tried the Vitacost brand itself? I did buy their digestive enzymes and those seem to be working well.