I've used a bunch of them with a bunch of different bows. I love Sportsman's but DO NOT let them work on your bow, they still owe me a new custom string after partially cutting it and trying to act like it was no big deal. Turks or Benton's are probably the best if you have to use someone. Personally I won't let anybody but me put my bow in a press anymore. About the only thing I let a shop do is cut my arrows down and Sportsman's has even screwed that up.
You should expect to pay between $60-80 for a new string. I would recommend a custom string maker like BuckNasty (my preference for a string) over any locally made strings. The local shops can put a string on pretty cheap but they are not masters of the string making craft by a long shot. They generally stretch and twist something awful.