The NY Times Wirecutter has a review of a large group of online photo services. It includes evaluation of quality (compared to their own prints on an Epson photo printer), costs, packaging, available sizes and paper, ease of use, and so on. Their top choice -- Nations Photo Lab -- is one I hadn't heard of before. It's a useful read if you're interested in printing your images and trying to balance cost and convenience between investing in a printer, ink, and paper or outsourcing your printing.
www.nytimes.com

The Best Online Photo Printing Service
We’ve tested dozens of online photo printing services, and we’ve consistently found that Nations Photo Lab is the best place to get prints.
