You're right Betty!
Preparation, preparation, preparation is the key to success using this product. There are not too many detailers recommended by Gtechniq on their site. Luckily for me there is a recommended highly regarded one in my area.
This process seems very cost effective considering the glossy finish, paint protection (UV, etc.) and the fact you do not have to wax your car if you go with the two step process. From what I understand the first step actually bonds to the clearcoat.
It is a 2 day process and according to my detailer if the surface is properly prepared (remove all surface scratches, swirl marks, clay bar, etc.) the end result will be a glass-like smooth surface.
The process is not cheap, but my local detailer says it should last for the life of the car - up to 600 washes. He is so confident in the product, he will repeat the process if it should fail.
You may want to check out the Gtechniq website.
I hope this info proves useful.