I've got something similar with my insurance company, it's called "Valeur à neuf", not sure what the exact term is in english.
I'm not sure what the amounts were for the first three years (I think it started around $100 extra), but for the 4th year of ownership, I'm paying around $250 extra. If the car is totaled, I get full replacement value of the original purchase price of the Sportage. They only offer this for the first 4 years.
In all, I suppose I will have paid $600 or $700 extra for this protection over the 4 years. Of course, once the 4 years are up without any claims, it'll be easy to look back at that money and say it was a waste, but with a quickly-depreciating vehicle, I think it's worth it.
Actually, now that I think about it, I kind of wish our Sportage would get totaled in the next few months to get something new!

That is, without anyone getting injured, of course!
