Having not seen your warranty, I don't think anyone can answer this question. You need to sit down and read the whole package. With that said, I have had extended warranty packages on my last two cars, but they were from Chrysler and Ford, not secondary insurance companies.
On my 07 Mustang GT/CS, the factory warranty of 3/36 was extended to 7/70, but again that includes the 3/36 factory warranty. So it basically added 4 years and 34000 miles to my factory bumper to bumper warranty. When I bought my CC, I cancelled this warranty, and did receive most of my money back, from Ford. They were very quick and I had a check within 5 days. This is something else you need to determine, can you cancel it without penalty and/or transfer it tto another owner, if you sell the car.
Again, please read everything in your package. I lost $1250.00 several years ago when Warranty Gold declared bankruptcy six months after I bought their package. So, I am a little hesitant to deal with non-factory warranty extensions. I filed against them in bankruptcy court , but of course have never seen a dime. Be careful.
My daughter has a VW Jetta TDI, and just used her extended warranty to the tune of $700.00 to replace a part and a wiring harness on the engine, at her dealer. I believe if you are going to keep the car, they are a sound investment, if you can get one, such as the Ford package, tthat will basically double your factory bumper to bumper.