If you wanna do something to make your car a real show car...go for em! I pulled a few trophies with em this past show season. They absolutely suck for handling, and everyday driving. That was the part i hated the worst out of everything! On the highway the car would pull in different directions if the cylinders had different air pressures. They were fun, but not when i got a ticket and had to go to inspections.
But to help you out, if your going for a show car, definitely do them, in that department you cant lose. But as your everyday driver, i wouldnt recomend them at all. If youd like to know anything else feel free to ask me.