This is a plug for Nations Photo Lab
I dabble in photography, and occasionally have something that I wish to print. Because I ditched inkjet printers years ago, this means sending my files to be printed.
Since local printers are fast and easy, I've tested Walmart, Walgreens, and the local CVS. And in each case, I've experienced sub-par quality and their systems screw up the colors of my images! Every time I would send a project, they would make skin tones way too red, and delicate lighting situations would look horrible.
After a search, I sent some test prints to Nations Photo Lab. They have an option to NOT adjust colors, and offer three paper types. My prints came back looking fantastic! Very close to what I saw on the screen in Darktable.
So... if anyone else out there in the US should happen to need a decent photo printing service, there you go. They get a thumbs up from me.
As an aside, I get nothing from this. I'm just genuinely happy with the results.