I agree c David. I didn't get AC just because it was inexpensive. I got it because I thought it was as good as many that were priced higher. If that does not continue to be the case I, for one, may well look for a superior product albeit at a higher price. I am sorry but I found Dr Bertman's post to be a bit on the defensive side. If you need to charge more to continue to provide a quality product then do so. But to suggest that you might not be able to provide that because of the price we pay seems like a risky way to present AC to the public. As far as the past studies are concerned, I would predict AC will slip a bit in future studies due to the recent frustrations. Amazing Charts is experiencing growing pains and I think that is beginning to show.