In my experience this is the worse company on planet earth. Truly horrendous! Avoid like leprosy.
If they are expecting a household emergency cover firm to fix their car, then yes it is most definitely a waste of money...
We have homecare from british gas, not the cheapest but they've done everything that's ever been needed from small leaks, blown sockets, drainage pipe leaks etc including replacing floorboarding. Also handy to book them in using the british gas app, fast and reliable for us, if you're not fussed on price give them a shot, although I appreciate your mileage may vary, however on comparison it does appear they cover a lot more than most.
I had them last year - similar deal for emergency covers including plumbing - I had broken pipe twice in 2 different bathrooms- they came within 4 hr of me calling - and replaced pipe without any excess charges - quite impressed with the service provided - premium went up from £1 to £16 a month after 1st year - but I felt it was worth paying .. in case of emergencies.. Had I not covered with them I am sure would have paid 100s for plumbing. I had option to cancel though after 1st year.
Heat from me. I've done this swapping between my name and the missus for a few years. Called them out maybe 2 or 3 times, for toilet issues, and i've been sorted every time. Not let me down yet. I'm assuming their Electric deal will be as good as their plumbing deal.