It was very very easy. The kit comes with a DVD to watch. They explain how to use each of their products and the steps you do things in to make it easier. Definitely watch the DVD prior to doing it. I had never detailed my car that in depth before so it was all new to me. Everything went very smooth. No problems getting anything off the car.
If you do get it, I bought mine through the Adam's website. When you check out, use the coupon code BRAD. Also select Brad Duval in the drop down of who helped you. He's the guy that hooked me up with the coupon.