As a former employee of Bridgestone/Firestone, I can say that I did notice that this tire wore on the edges quite heavily on customers' vehicles. I installed this tire on my Odyssey van 30k miles ago and they have worn the same way for my personal vehicle after 30k miles. I live in a mountainous area, which causes tires to wear 30%-50% faster than in "flat land". I suspect that the sidewall design must cause the tire to flex more than most tires do when turning the vehicle. As a result, the tires wear down to nothing on the edges and the center tread area still have 4/32nds to 5/32s remaining. Noise levels and ride quality are very good. And any improvement in fuel economy is as I expected...nothing you can actually observe on a day to day basis. Your vehicle's fuel economy is 99.9% affected by how you drive and what you drive. 00.1% is maybe affected by your tires. I will add that I have the same tires on my civic (only difference being the size and load/speed rating, which are 205/55/16 91H) and they are wearing perfectly normally with absolutely no sign of edge wear. So I suspect that the taller sidewall equipped tires are more prone to edge wear than the shorter side wall tires. Also, I rotate my tires every 5,000 miles and have the alignment adjusted annually, so they are maintained as well as can be expected.
Can't believe the other reviews on this tire. I had Michelin and two tires needed to be replaced (abnormal wear on one and bolt in the shoulder of the tire that couldn't be repaired. Took a 1200 mile trip with these tires and can't believe how quiet, soft, and fuel efficient they are. I didn't think any tire could make much difference in fuel mileage; but I'm getting a full 1 mpg better with these tires. Haven't had them in snow and only rain was at highway speed where I couldn't tell any difference.