I did research and realize the CPO "assurance" was basically bunk and the inspection rather cursory, but ended up buying CPO anyway for the value of the warranty, after pricing out third-party extended warranties. Also the salesperson claimed the CPO warranty was bumper-to-bumper, but I verified it is not but understood what I was getting and not.

I also made sure the car was still within the original warranty, and ended up having several issues fixed under the original warranty. They would've likely been covered under the CPO warranty as well, but just less potential hassle with the original warranty.