Comments: The 1400 V2 does not necessarily fit smaller. Much of the fit issues are due to the new insole. Since I swap the insole out for a Superfeet Black, the V2 fits me in the same size as the V1. I'm pleased with the update and happy I opted for a pair of the V2 as opposed to a closeout V1.
From: Jeff, Scottsdale, AZ, USA
Comments: Upper is stiffer than original 1400 and the fit is snugger to forefoot. I wear the 1400 without socks and the upper fit on V2 is less comfortable because of stiffness causing rubbing on top of my foot. Right out of the box they felt incredibly light. A noticeable difference in weight from V1. It has a bit less of a cushioned feel to me when run back to back with the V1. Looks like there is less Revlite foam in the heel to save more weight. My opinion is buy all the V1 1400 you can. This update is not better than the original even though it's gotten lighter.
From: Joe, Nashville, TN
Comments: Nice shoes but don't get fooled by NB marketing. This shoes fit way smaller compare to the previous version. It might be 0.7oz lighter in size 9 but if you needed a size 9 in MR1400 you will certainly need a size 9.5 in MR1400v2, the comparison is biased and you might not shave that announced 0.7oz.
From: Jee, New York, NY, USA