A review for Circle stickers by Jonathan Knapp.
I purchased these stickers after getting a coupon from Code School: Summer Camp and hearing good things about Sticker Mule from other people in the past. The invoice got messed up somewhere along the way and I was charged full price, but a quick email with their support team and they refunded me the difference.
The first batch of stickers looked good, but about half of them were skewed and made the circular border look pretty bad. I reached out to support one more time, and they asked me to send a pic showing the issue with the stickers. They quickly responded, explained that something must have been a bit off on one of the cutters, and recreated the order for free without me even asking.
Excellent customer support and the stickers look great too!