Brochures use strong words because strong words sell. A contract is a different document, and the words on the brochure only mean what the contract says they mean. Your job is to find the definition behind each bold description before you give it any weight.
Take the words individually
Pull the adjectives from the marketing page and write them down. Common ones include complete, comprehensive, bumper to bumper, lifetime, and unlimited. None of these is a legal term in itself. Each word points to a section of the contract, usually a covered parts list, an exclusions page, or a definitions section. Find that section and read it before you decide what the word means to you.
Check the exclusions against the description
A contract can be broad in its opening pages and narrow in its exclusions. Read the exclusions with the same care as the coverage list. Look for language about wear items, maintenance, pre-existing conditions, modifications, and use of the vehicle. Those are the sections where a broad description tends to shrink. Ask the seller to point you to each one.
Test whether the claim process is described at all
A contract that sounds generous can still leave you guessing about the claim route. Check whether the document says how to report a problem, how the shop is authorized, how long a decision can take, and how a denial is reviewed. If those steps are missing or vague, the strong words on the brochure are doing more work than the contract is.
Where to look for comparisons
This site's comparison pages list published terms, and the how we score page explains how each company is rated against a fixed rubric. Use them to see the wording side by side, then return to the contract you were actually offered, since a sample in a brochure may not match the paper you sign.