Powdercity is absolutely awesome. I was compelled to write a review somewhere after a recent experience with them, and this seemed like the best place to do so.
I recently received an order for them. After which, I realized one of the products I received had incorrect information in the description on their Web site (information that more-or-less made me end up buying the product). I Emailed them on a Sunday, showing a screen shot listing the incorrect information. At around 9:15am Monday morning (less than one business hour from my Email), I had an apology Email which explained that I was being refunded the full amount for the product (which was visible in my account less than an hour later). The Web site description had also been corrected immediately as well. AND, to top it off, they didn't even request the item back. They are very dedicated to customer service, and I highly recommend them. Though, I definitely recommend using their Web site, and not going through Ebay.
The only thing I could gripe about is that all of their powders come in sealed bags. Though, there's hardly an argument there because they also sell plastic tubs for about $1.50.The only other site I've bought from was Newstar Nootropics, which is excellent as well (and their powders come in glass jars); however, Newstar is dedicated to experimental compounds and has a limited inventory.
I've never had such a pleasant customer experience with any company. Let's hope it stays that way, and they don't start slacking as they grow.
Highly recommended.
(Just a side note: I realize I have only like two posts on this site—which may make this seem like this is endorsed by Powdercity—but it's not. If you doubt that you can PM me for proof.)