I love to make pillows and over the years I have decided I like the zipper in the back rather than in the top. It allows me to put binding on the pillow edge if I want to. The zippers I put in are exposed, which are okay, but I would rather like them to be hidden. I found a great tutorial on how to put them in that way. I will be trying this technique soon as I have a pillow to fix.
Put a zipper in your pillow tutorial by House on Hill Road from Erin Harris on Vimeo.