A review for Die cut stickers by Pat DePuydt.
My brand depends on an RGB based color scheme, but Sticker Mule prints in CMYK. The problem with the stickers wasn't on Sticker Mule's part but it's hard to match the vibrancy of a specific color in CMYK if you design in RGB.
Other than that, Sticker Mule is great. The text updates are especially helpful.