The Top 5 Best Shops (In no particular order)

Precision Auto Aesthetics, The Lab, Every Detail Matters, JP's Mobile Detailing, Buffalo Car Care

What does your prep process involve, step by step?

Start with a wash, decontamination, then clay bar treatment, followed by polishing, and finish with surface prep.

What is your personal guarantee if something goes wrong?

If the answer points entirely to a manufacturer's warranty, the shop isn't standing behind their own work.

Is a ceramic coating actually the right fit for my situation?

A shop worth trusting should be willing to say no. If they're eager to recommend a package before understanding how you use and care for your vehicle, notice that.

What protection term makes sense for how long I plan to keep this vehicle?

A good shop will ask you this before you have to. If they're offering a 5- or 10-year coating without knowing how long you'll own it, they're just focused on price.