A setup also includes a new fresh set of strings if you provide your own or they'll provide their own but it will cost you . I would also recommend making a post in the guitar tech section to for Steve because he really knows his stuff and he can give you some tips on what happens in a setup .
Most setups are easy but I was a victim of simple guitar setup that was botched and it caused only more problems . So a guitar setup can go bad from time to time . Just depends on how good the tech is
And he can address all your questions on setup and guitar problems and such .
I had a setup done on my first guitar and it was a cheap 125 robson acoustic ( Not even a brad name )
Anyways I had a setup done at a local guitar store and was not pleased ( The action was set very low but as a result the nut action was too low and it caused problem with buzzing and other problems arose .
Just ask Razbo how much I regreted not investing into a real good guitar when I first came to GT and all the frustrations I had eh Razbo :(.
Anyways I just got a brand new guitar for 1000$ Godin Multiac Spectrum SA .
The action isn't too bad on the high frets but around the 15 fret the strings are a little too high for me so I am taking it in a for a setup once my new hard case arrives .
In any case I will be asking Steve what errors I should look for after a setup that way I can get it fixed before paying for it