I've had a great experience with Sticker Mule up to this point. How the person dealing with my proof rejections couldn't understand that I wanted my logo centred on the mailers I don't know. I had a back and forth of messages with them several times explaining I wanted it centred and made a final proof submission for a centred print. However they have come off centre and over the natural border on one side of the mailer. Surely its obvious no-one wants their mailers to look like this? These are too embarrassing to use and so it was money wasted. They are far more off centre than they look in the preview image. Sadly I can't post a photo here.

Unusable