It will change the handling of the car a lot. It will make it rotate easier so be careful. It will be most noticeable at highway speeds. It's not unmanageable but be ready for the back end of the car to want to come around on you a lot faster and easier than it used to.
Serious track/auto-x guys would remove the front sway to help encourage the car to turn better. Again it's just a balance thing. I don't think it will adversely effect your driving. Just something to be aware of.