2020 Outback in Buffalo, NY

Recently bought a 2020 Outback Touring with 50,000 miles on it from West Herr in Orchard Park. They offered to sell me an extended warranty for 4k for an additional 50,000 miles since it is passed the original warranty. I am curious as to whether or not the extended warranty is a good deal and also whether or not West Herr is the best place to take the vehicle to have work done or if there is a cheaper Subaru shop around here?