I thought I would mention my pepboys experience today and then others can vent.
After I got my limited lowered, wheels aligned and wheelspacers in (at a performance shop), the car was shaking a tad between 60 and 64 mph. Since my tail light went out and I was going to Pepboys anyway, I thought I would get my wheels balanced there.
After they completed the work, I noticed my car looked wrong. My front wheels were sticking out of the fenders and my back wheels were way inside the fenders. Did they mix up the spacers? Upon further investigation, I realized that they had rotated the tires (brilliant). I should have taken a picture. They put the rear wheels on the front and the front on the rear. Then, the guy argued with me that nothing was wrong. Eventually, they got it straightened out. In other words, I would not recommend Pepboys for anything.