Originally Posted by Sanguis Mortuum
Nothing that costs quadruple the price is ever 'quadruple the quality'. There are diminishing returns.
I've always thought this is a little debatable, because really it depends how you define value. Given a Â£10,000 Kia and a Â£40,000 BMW/Merc/Saab, for eg, the BMW/Merc/Saab etc etc wont be 4x faster or take 4x the number of people on a journey. To someone who wants to be a BMW/Merc/Saab owner though I suspect the overall experience of owning the Kia would be such that they would hate it so much that the BMW would be worth the additional Â£30,000.
From a leather goods point of view its quite likely that a good quality item will last 4 times the life of a cheap product and the same could be said for good clothing as well.
I suspect that the above is true where the premium is caused by the designer name rather than the intrinsic quality of the constituent parts.