Last Christmas I uploaded about 200 pictures onto Walmart's photo printing site. I was going to make a few small photo albums, and include photos in Christmas cards. The price was relatively comparable to other services in town (Target, Walgreens) so I decided to use Walmart since that is where I do a lot of my shopping.
The first problem I had with the prints is I was under the mistaken impression that your prints will be printed at the store you designate. They are actually printed somewhere else and shipped to your chosen store days later. So, I had to wait four days before picking up my prints. I believe there is an option for in-store printing in some stores, but this was not an option for me and is something I did not realize until too late.
When I did pick up the prints, I was extremely disappointed in their quality. The reds were too red, and many of the photos were too dark. I did not attempt to return them, so cannot speak to what would have happened had I chosen to have Walmart address the issue.
I also like matte prints, which is something Walmart photo printing service does not offer.
I will not use Walmart photo printing service again. I have had much better experiences at other places, and am willing to pay a little extra if I need to.