I had the Magnets for my Save The Dates printed thru Squar Pix. They turned out great and the company was incredibly easy to work with. We emailed a file (so i could customize my image different to some websites) and I picked up the magnets a few days later. The only thing I would change is that we only needed 150 magents and ended up needing to buy 200. This was still a better way to go than online printers, but I feel bad wasting the magnets since we now have 50 decorating our fridge.
Definitely would recommend this vendor.