I asked my question because I had these on my car for approx. 10 months. Some pros but the biggest con is that VSC kicked in aggressively under street conditions when coming off things like freeway offramps (at higher speeds). Felt like I was trying to trailbrake the curve and then VSC kicks in.
http://www.ft86club.com/forums/showthread.php?p=2725203
I had tested them out, they work well but probably better for autocross or drifting. Track was okay but with the spacers the initial turn-in was much faster and you have to adjust your driving habits to match the parts.