#printfection

And by far the best of the lot is PRINTFECTION, not only because the print quality is beautiful, and the products are such high quality, but they have a fantastic customer service department.

I've never had a return, but once I received a mug and I thought the image was printed too high, and they replaced it at no charge, I didn't even have to send the old mug back. Images are printed true to the original art, I've purchased the clothing, washed, worn, multiple times without any scratching, bubbling, cracking, peeling. They recently sent me a new hoodie just for responding in the forums. (daughter stole it)

They also do not portion work out, so your customer is happy, only paying one shipping fee, instead of $ for a mug and $ for a tee from another vendor. Ordering is easy, shipping International. 

If you are an artist I highly suggest going with them, as you control your imagery, control your profit margin, the site is free (no hidden fees) and dead easy to navigate and design your product, base prices are fair to the customer, you get detailed stats so you can even send your customers thank you cards, your work can't be used as templates, and the shop won't sell in bulk to a third party and set the price without your consent as some shops do! I also am notified of a sale when it is ordered (not after it ships) and I've never had any problems receiving my money on time. (via check)