I Have had mine in on my truck for years, go wheelin quite often, never had an issue...
Nothing extremely hardcore but definitely some tough trails and rocky terrain.
Wouldnt have been able to do half the stuff I can without them and the larger tires they accomidate. Hardly even effect the handling at all. I say go for it, its an inexpensive and fairly easy way to lift your truck, and if you dont like it, which you will, you can easily take the kit out also.