NA,
Which model do you have?
I have the P1000 and they come out like shit even on the highest res, but that's probably because it's an old model. My boss's Epson does OK prints but I can easily notice the flaws. I think the ink costs are roughly 8-10 cents a sheet for prints even for the really good printers. Once you factor in another 15 cents or more per sheet for glossy paper, you are fux0red.
The only downside I see with Walmart is that the in-store employees are so fucking dumb.
"Walmart photocenter. How may I help you?"
me> "Hi I have some digital camera prints I'm waiting for. Could you check if they are in yet please?"
"What kind of digital camera?"
me> "Uhhh... I'm not shopping for a camera. I'm asking about my prints."
"Ohhh...." *ruffles through some papers in a file drawer*
"No they aren't here yet. When did you bring them in?"
me> "I didn't bring them in. As I said, they are digital camera pictures. They were uploaded to the Walmart photo center on the Internet."
"Oh...." *ruffles through another drawer*
"No they aren't here."
me> "I just got an e-mail that says they are."
"uhhh... durrr... uhmmmm.... "
me> "..."
*click*
-Warik