I have had a look at their website. It is insurance for the excess applicable when you hire a car. It does not replace CDW which as I read it you still need to take out. I would describe it as insurance against uninsured losses.
My reading is that the insurance cover is for the named driver - additional premiums seem applicable for a second driver.
You are required to pay any charges prior to the claim.
They will check that any insurance cover applicable to the vehicle does not cover what you are claiming. Should that be the case and you have paid up then you will need to try to get your money back.
I do think, as we often say on HT you need to read the terms and conditions fully before you sign up.
They claim that CDW does not cover everything, and in certain cases that can be correct. I do wonder if it is as good as claimed.
If you deal with a reputable company then you do not get "hidden extras"
In all my years in the motor trade and involvement with vehicle hire, tyres were always the responsibility of the driver.
They claim they are covered, but then how many people have tyre problems. In a two year period of vehicle hire we had one puncture on the fleet.
Damage caused to the underside would indicate to me that someone was taking a vehicle over an unsuitable surface. Funny how many think a RAV4 is an "all terrain vehicle?"
And there is the problem. ALL insurance cover has a duty of care - I rather think that you would need to prove that you had not been driving in an inappropriate way.
If it gives you peace of mind then fine. From a personal point - and accepting that I do have some specialist knowledge of insurance of hire vehicles. I would not bother.
fwh