Rental insurance through the rental company is much more expensive than if you go through priceline and buy their insurance but I am not really sure what the difference is. We never bought insurance because we used the cc insurance in the past but then discovered they will only pay as a secondary insurance if you have insurance for your own car.. my H does not want to use our insurance for the rental in the event something happens.. does not want to have our rates go up.. so we pay quite a bit when we rent (22 per day for many companies) but I noticed insurance through priceline is like half that.. I was not sure if that insurance was as good or as reliable should something happen.. Any one have any thoughts on this?