I have been very pleased with the quality of the digital photos I have had developed at our local Costco. The convenience is amazing. I typically upload my photos to the Costco.com web site and select the type, style and quantity of prints and hit the send button. My prints are usually ready in an hour.
I find this super convenient because there are lots of times that I upload the photos in the evening when I have time, and then all I need to do it pick them up sometime the next day...it works well with my schedule, and I do not need to pay for shipping.
I like that they offer several options...glossy vs. luster, white border vs. borderless, and of course the various photo print sizes. You also have the ability to zoom in or crop the photos if you'd like, which is a really handy feature.
The only downside to using Costco is that you need to pay a membership fee for access to the warehouse club, but if you are already a member, you should consider this convenient option.