Be sure you also check the thicknes of wrap, not only lenght and wide. For example, some comes in 1/16" thicknes and some 1/8" - That is 100% difference in thicknes and this should be reflected in price, because if you are buying 15m of 1/8" it is exactly the same like to buy 30m of 1/16" even the roll size will be exactly the same - checked.
I have own experience with thermotec and thermalzero products. Thermotec seems very thick but good finish, thermalzero are stripping very easy, but you can get it in diffrent thickness and they are cheaper.