A secret shopper from http://buygoldwithbitcoin.com/ recently made a purchase from 4 of the largest precious metals companies that accept bitcoins: Agora Commodities, Coinabul, GoldSilverBitcoin, and Amagi Metals.
Sounds exciting! Could you post a link to the review?
It was a personal e-mail to us however I think they are waiting for a few shipments from other precious metals companies to post the reviews on their website. We'll let you know when those are posted!