Let me tell you a story about OAKLEY sunglasses. They had this thing - if you managed to break a set within a certain time frame - way longer than a normal warrenty, they replaced them FREE OF CHARGE and used this as thier USP (Unique Selling Point), and reason why they cost 3x a similar pair of glasses cost. I have to wear sunglasses a LOT as I'm photophobic, and break them often enough that I normally have several pairs on the go, and at least 2 in the car or it gets dangerous to drive, I'm that sensitive to light.
Anyway, I buy a set of Oakleys knowing if I break or damage them I'll get a replacement - as they were more expensive I kept them for driving only as they were polarised. Inevitably I broke them. I contacted Oakley to find out how I went about the return and where and got the reply "sorry we no longer do that" it was becoming too costly to offer that service. Turns out that that service had stopped before I had even bought the pair despite the salesman in the OAKLEY CONCESSION where I bought them telling me otherwise.
Yes I tried to argue the point but they said "sorry nothing we can do" and the sales person at the concession had moved on - so I was out £120 for a set of glasses that although nice were not significantly better than buying 6 pairs of cheaper £20 sunglasses.
A selling point is a selling point, and regardless of use after the fact, if you pay for something on the basis of a particular benefit to you, and that benefit changes after that fact and, moreover, when people pay more than the guy sitting next to them for the same thing, because they were given a line that turns out to be not quite what they were led to beleive, then people have a right to feel as though they paid over the odds to a greater or lesser extent.
This is so true infact that in retail you should now always ask staff "is there a sale soon", because of you are considering a high ticket value item and you are told "no there is no sale soon" and it turns out that there IS a sale, within a month I think, you can go back to the company and request they give you a refund of the difference in ticket price between what you paid as full retail and the sale price as you made a specific request regarding any upcoming sales information and were misled.