again in 2, 6 or 12 months later it will look that same as the first print as their system is consistent.
you should be able to ask the lab “here is my image and what do you think.” you should be able to ask about what size you can print it. over a year i lose thousands of dollars of printing work through my lab still creations because i tell people the size they want their image printed won’t look good and i recommend a lower size where they get a good quality image, in some cases, i don’t recommend they print the image at all due to the file 