I purchase a voucher from Scoopon a couple of month ago and ordered 2 personalized cufflinks. They also offer other personalized items too.
After I paid I went to their website and uploaded my pics and input the rest of my details for the cufflinks to be sent. During this time I had further questions and when I did emailed them, they emailed right back promptly. Service was great.
When I received the end product, the cufflink was a little small from what I pictured it to be but beside that, everything else met my standards. Very happy with the end product.
Would definitely be recommending them again to a friend.

Approximate cost: $avg