Let me see. When we bought this house we got full buildings and contents, including a boiler/water cover.
Month 1: kitchen floor sprang a leak, water cover activated, kitchen floor dug up, leak fixed, floor reinstated. Cost £0, and no insurance effect as it was the cover not the insurance that dealt with it
Month 6: Boiler went, again the water cover was activated, comprehensive report and recommendations given. New boiler fitted, old pipework removed, immersion and header tanks also removed. Cost, just the boiler!
Month 30: Poo explosion, yet again the water cover was activated. Nice man came out, too a look, said "Shared drain, no can do" Then explained what that meant, that the water provider was responsible, he then made the call and got them to come out. Cost £0.
If you tot up what those obs would have cost if we'd had to pay for them it would have been £5K minimum. As it is the water cover has cost less than £500 for 3 years.
Imagine what something structural would have cost....