I have ordered quite a few items from Art.com with mixed results. Most of the items were fantastic (very vivid lush colors printed on thick quality paper), but some were shockingly amateurish (blurry and faded colors on cheap, thin and frustratingly warped paper.
It's interesting how many reviews I read that complained about the customer service. When I needed to return items, I was treated with professionalism, courtesy and respect. In fact, they said I wouldn't need to return the item at all while providing a full refund. This is why I keep going back; this type of Rockstar customer service makes me feel much more confident about ordering images I love.