Believe the hype. These are awesome. I've run primarily in Mizuno, and I log 100 - 120 miles per month. While I do love Mizuno, they have been getting clunkier and heavier - and their durability has been disappointing. I chose these over Saucony A-type, to give them a try after reading the reviews, and doing some minor research. I've used them solely for treadmill running and my first impression is because they're so light, you're less weary at the end of an hour on the treadmill. The comfort level is phenomenal, and at first view, I thought the feel would be similar to Reebok Zig models -  but they are nothing like that. These slip off and on easily, the wider toebox provides more comfort even for persons like myself with normal widths. I can't wait to test them out on much longer outdoor runs in challenging conditions - but so far, I have no regrets! ... Just hope they go on sale soon!!