The main thing we need to know is what problems you have been having. Things like buzzing in particular areas, action too high, fretting out durring bends, intontation problems and other things like that. Also important, though less so than some would think, is your particular style of music. For far greater importance is how YOU play. Are you particularly agresive, or do you have a light touch. Do you do a lot of heavy struming, or are you a fingerstyle player. Are you playing heavily distored, or as clean as can be. Are you more concerned about the ability to bend, do you use a lot of deep vibrato, or are you a speed demon.
Also, it should never be a situation where you come in and get it set up, and then it's done. MOST of the time, we get it right the first time. But you should ALWAYS have the ability to come back for a touch up as part of the deal. Remember, for most people a good setup is a very fine balancing act between having the action high enough to keep from buzzing, and having it low enough to be comfortable to play. Even the best repair people sometimes go too far one way or the other. Our rule is simple, if it isn't right for any reason, bring it back within a resonable time frame. If you come back in a week or two, maybe even a month (depending on time of year and such), we'll take care of it. Come back in a year saying it was never right, and you're out of luck, but then that should be obvious.
Light
"Cowards can never be moral."
M.K. Gandhi