I wouldn't try to center anything on these buttons since they're all off. They ship loose in an envelope, but it's hard to mess up buttons and they're sturdy. They're a little pricy for what you get, but they're decent quality.
Pins are great. The sample given on the site was spot-on. The prints are good quality and the pictures are vibrant. The only complaint I have isn't even about the pins or quality, it's about the shipping. To order posters, magnets, and a few stickers with pins - shipping was over $20. That is outrageous. I could go to USPS myself and get overnight shipping for that price at the same weight. Everything was very light and was sent in 3 different packages. When I ordered samples of 2 hoodies and a shirt, the shipping was $13 for comparison.
It looks nice! It is a bit hard to figure out if the image is adjusted correctly or not, but they are very nice!
Buttons were good quality, but the package was very difficult to recycle; paper with plastic bubble wrap stuck so tight it was extremely difficult to separate. With a product catalog that features organic and eco merchandise, it makes sense to send items in easily recyclable packaging.