The disadvantage (for me, at least) is that they took the data in RGB, and printed from there. In fact, to all appearances, they did the cheapest, dirtiest RGB to CMYK translation available.
As a result, my light blue background is a medium purple. Granted, I like purple (obviously), but it makes the text a lot harder to read.
Live and learn. It's not like I'm not going to pass them out.