There are literally hundreds of threads here, on 3rd party extended warranties. A quick search will get you weeks of reading.
Bottom line is that nearly all will not cover the expensive stuff, like bad roofs or delamination. It's all in the fine print.
Dan-Retired California Firefighter/EMT
and Zoe the Wonder Dog(R.I.P.)
2016 PrimeTime TracerAIR 255, pushing a 2014 Ford F150 SCREW XTR 4x4 3.5 Ecoboost w/Max Tow Package