What part of not approving my estimate and forcing me to go through their centers do you not understand?
And what part of how do you know what their shop will do or not do until you go there and find out.
I was once like you when I was young and stupid. When anybody hit my vehicle and was at fault I went and got my own estimates and fought about it. Then one time I got rear ended and the other driver's insurance company said take your truck to our preferred shop and they will write it up. You don't have to use our shop but we will pay based on that amount. I thought, I'm to old to fight about it, so I went. They wrote it up. Looked fine, nice looking facility, and they had a direct bill setup with a nearby rental car company that would have a car waiting for me when I brought the truck in and it wouldn't cost me a nickel. A week later I went to pick up my truck and IT WAS PERFECT.
How itemized does everything need to be? Meaning I plan on making sure that all costs I incur are covered after the suit is finished.
Do you know what a supplement is? It's when the shop starts repairing your vehicle and finds additional repairs necessary. All they do is call the insurance company and get approval for the additional work. It's routine.
Either use your Collision coverage or take your vehicle to their shop and see how it goes. Or, you can waste the next couple of months battling it out in court where you don't get paid for your time off from work, you don't get paid for a rental for the time you can't use your car. Your choice.