I hear you. It was a risk I weighed and decided to take. They have a mostly sterling reputation in the Tesla community and answer the phone when you call.
To me it was either sell the car once repaired or buy this insurance policy. I look as it as less than sales tax if I purchase something...
After charging at tesla supercharger, someting happened in the handshake and those parts "failed." Factory warranty over and only battery warranty remained. They said it was not the battery but battery componets so not covered. I escalated multiple times to PCNA for goodwill without success...