As I said before, this is why I chose not to permanently modify the factory setup. In addition, this is why I wanted to test the setup since last July (6 months) without any problems.
The only issue I've seen is if I try to put the height into the "low access position" via the factory dash switch on very uneven ground, the system cannot lock into the low/access position since it does not enough adjustment left in the system since it is already low to start with. Other then that, it works fine. Additionally, I have also serviced the truck with the kit and will be servicing it again (33k inspection) and have had no problems as of yet. If someone is worried, you can just remove the kit prior to service (or remove it if any factory bugs pop-up) and no one will ever know. Additionally, it is illegal for a dealership to void a warranty for due to aftermarket parts. What the dealership CAN do, is if you have a problem with your car, they could blame the problem on your aftermarket part and not cover the problem under the factory warranty. Yet the dealership still has to show direct evidence that the aftermarket part could have caused the problem. For example: the dealership can’t blame an aftermarket exhaust system for causing a motor to break. However, they could blame the aftermarket exhaust system for causing various rattles, resonance or discoloration of on the rear bumper. Another example is if you were having electrical bugs (VERY common on BMWs). If you had a aftermarket stereo system, they could blame the electrical bugs on the aftermarket stereo system causing unnecessary load on the systems electronics or faulty wiring. I even believe that operating a cell phone inside the truck could also cause issues (VERY REMOTE), however check the “clear” sticker on your windshield or in the owners book. I believe it says something like this, “operating non-approved aftermarket inside the vehicle can cause unintended problems, please contact your dealer for approved devices, etc…” Again it is a stretch, yet the dealership has to show direct evidence that the part caused the problem. If you’re worried just remove the part prior to visiting the dealership.
Also if you plan on finding a dealer to lower it for you, that will also have the same warranty problems if you do have a problem with the system because you asked the dealer to modify the system outside the factory parameters. Others have had to sign wavers for this. Also if you did not sign a waver, they will notice the settings were changed and could still blame that for the systems problem. This again is the reason why I wanted a setup that could be removed without any signs of alteration.