I'm a long-time fan of DnDice's products, having bought several sets for myself and others at conventions, from Amazon and from this site. The dice are great, the little extras thrown into packages are a nice touch and, generally shopping has been a great experience.
That said, this is the first time I've had to contact them regarding an order, and it's left a bad taste in my mouth. I ordered the Obsidian Heart, Mythic Transmutation set with Special Delivery to arrive on the 5th Jan, but they arrived three days late, which I found (via the packaging) out was due to them being sent via 2nd Class mail.
While waiting, I tried contacting DnDice on Jan 7th; the Contact page has no phone number, so I tried the form on the site and also replying to the shipment notification, and have not heard back. Really, there needs to either be a phone line, or some triage of emails, etc.
I bought these as a present for my DM as a thank you for hosting 2~ years worth of sessions and he absolutely loved them. The dice are beautiful and feel really solid the sort of thing you would treasure for a long time to come. I would say they're a little pricey and in low light they can be a little hard to read, but I would gladly buy from here again. :)