I agree that a flawed product is typically better fodder for analysis than either something “perfect” or “abysmal”, and hey, if the scale works for you, don’t let me yuck your yums. You had the courtesy to explain what the ratings mean, which is more than many such systems give you. I think I am simply preconditioned to equate a ten point system as roughly analogous to school grades, e.g. 6 represents the lowest “passing” grade, so I was taken aback by your system.