Full Source generally messes up proofs, but if you are diligent you can catch mistakes. Orders ship loose and sloppy in a big box, but hey - they are cheaper than most competitors.
Unfortunately, Full Source recently messed up an important order and - get this - refunded the cost of embroidery only (and that only begrudgingly.) My company was out a grand due to their clear mistake. I may yet take them to small claims over it. I will never use Full Source again, and hope that others are able to avoid a similar experience.