I got bad customer service
I ordered 25 tri-fold flyers* from Eprintfast and the quality was good and professional. So I decided to order 500 more. This time the quality was mediocre. It seems that these brochures were printed with a lower quality option than the first ones (such as incorrect colors, darker contrasts and grainy printout).
When I asked customer support to reprint them they told me that "order was printed as supplied within tolerance". Well if the colors on the flyers are supposed to be light orange and light blue and you get instead orange brique and a grey blue I think it is legitimate to complain. One of the character with light skin color appears almost black skin on the pictures without mentioning it is slightly pixelated.
They close the case while I was asking to talk with a manager. I have years of experience in customer service and I can tell you this is bad customer service.
If something goes wrong with your order do not expect good customer service from Eprintfast because there is not any.
*The brochures I have submitted to Eprintfast are designed by professional designer with 300 dpi pictures and are converted in CMYK colors