Good customer service, but their providers are terrible. I ordered sample mugs and tshirts and the quality is not good. When the replacements came, the t-shirt had an oil type stain and felt sticky and the mug print was blurry at the bottom. MyLocker's quality control is nonexistant and Printify would do well to either tell them to step up or stop using them.
It is a shame because SPOKE reviews aren't much better and if you want 15oz mugs, those are the companies to choose from there.
Very disappointed in POD and I can't in good conscience sell these products to my customers.

Inconsistent delivery. Careless operation. - Every few orders aren't printed within the generous 10 business day deadline for fulfillment, get 'lost in the mail' (before being in the hands of USPS) or have some other issue. This is supported with only lip service from Printify, as a middle man, and little or NO COMMUNICATION from the actual print vendor. Disappointing clients without any sort of explanation is horrifying, and a business-killer. Random reduction in print area on a garment, without warning or announcement, is no big deal to them but means WEEKS OF UNEXPECTED WORK for me with hundreds of items - showing carelessness and complete lack of business insight. As one of the 'big 2' POD providers, I don't know if I can afford to wait for Printify to mature their operations and ethics. These and other ongoing issues are outweighing the orders fulfilled reasonably and have me wondering if I should move everything to Printful, pay a little more and get a lot less stress.

Their customer service is fantastic! They got back to me in a half hour on a Sunday. Very professional, and all of the t-shirts turned out great.