Anyone using rear wheel spacers to give more aggressive look?

[cvhs18472]

I have 7mm H&R spacers on all 4 wheels and have no trouble. I believe that they make the car look a little better though I don't see any handling differences. When I got them I talked to the parts man and he said to just be careful because if you had different sizes front and rear or just on rear or front you would change the steering and create over or under steer problems. Sort of makes sense. Ed