I was a real fan of the first edition of the Brooks Pure Flows but a couple of things did bug me. One was the tongue of the shoe kept sliding to the side and while the fit was good it wasn't great. This has been corrected with the new Pure Flow 2. On the upper, a fold-over tongue design and asymmetrical lacing deliver a fantastic fit. This makes the feel of the shoe to me is better than the first edition. I have put 70 miles on the shoe since I got them on 5 Dec and like them so much I ordered another pair for Christmas and have the silver and black pair on pre-order (really like that color). The ride feels better than the first one and the toebox feels wider than the previous Pure Flow. Also the shoe is about a half an oz lighter it feels that way to me as well. All in all a great shoe and should be a great trainer that one can be good for fast runs as well as regular training runs. I highly recommend it.