I've driven and been passenger in a few bagged cars but never owned one. The comfort is great even at low settings, though both car's were a4's so comfy enough to begin with. The basic systems are a bit crude for my liking and for cheaper systems the pipes perish so you really get what you pay for. My friend had a close call when a pipe split and the front of the car went from normal to decked in 2 seconds. Lucky for him custom guards had been built around his box and sump but id imagine it shouldnt have happened in the first place