Standardization = Good rating

When everybody in the US is buying the same windows, the same doors... Then rating reliability is much more easy. In fact, it is just statistics ! When many people are speaking the same language and at the same time are using the same kind of products... then Internet ratings are reliable. However, when you take a look at Europe... Italian style is different than German, French and Spanish. So is Internet rating an utopia in these countries ? Yes and No. Yes because you cannot count on the number, No because you can replace numbers by software technology !