I found Nation's Photo Lab on some professional sites where they reviewed dozens of online print places.
I have gotten 5 or so orders from there and had no issues.
I just received a few 20x25" prints and they look perfect. They were like $4 ea when on sale.
They have sales just like everyone else, so watch for those.
I recommend their lustre finish. The metallic was interesting, but not something I would ever use.
I ordered a few test prints in all paper types initially to test them.
Shutterfly, Walgreens, CVS, Snapfish, etc are all trash compared to Nations, IMO.