I just bought 6 different bumper stickers from Zazzle. They shipped promptly and appeared exactly as depicted online. Zazzle bumper stickers are a little thin though (how else could they keep the price so low), so you have to be extra careful during the application process to avoid bubbles and/or creases. Having said that, I like to change my bumper stickers often and will definitely be getting them from Zazzle.
About the print:
The "EMBRACE PEACE" sticker was especially visually appealing.