I have been asked by several of my clients if they should print their photos at a drug store photo lab (Walgreens, CVS, etc.) or one of the cheap online photo sharing sites like Shutterfly or Snapfish. While those places are great, affordable options for snapshots, I strongly discourage printing your professional photos at a discount photo lab for several reasons. There is a noticeable difference in the quality of a professional print versus a cheaper version. The details are much more crisp and clean and the colors tend to be more rich.
Another, perhaps less noticeable, difference in a professional lab versus a budget lab is the way the colors in your photo appear. When I partnered with my photo lab, I submitted several test shots to their printer to calibrate my computer monitor with their printers. This ensures that the colors you see on the computer screen are consistent with what your prints will look like.
I'm certainly not discouraging the use of the more budget friendly options for snapshot prints. However, I think that for the amount of money you spend in having professional photos taken, an equally important part of your investment is to get quality prints!