I just received my first order of 12x12 scrapbook pages from Persnickety Prints. I'm am super thrilled with the quality--and they were super fast! I think they do an awesome job and are really eager to make you happy by doing the best job they can.
I've never had 12x12 pages printed before (I usually print 8x8 on my printer and back them with 12x12 cardstock or designer paper) and I love how these prints look. I'd highly recommend Persnickety!
I'm not affiliated with them in any way--just happy with their work!