I read a lot of feedback and suggestions from Amazon and Zappos before I made this purchase.  The construction is good, but mind you, for those who wear "N" or "M" in shoe-width maybe disappointed.  My shoe-width is "M" in heels such as Stuart Weitzman, BCBG, or Cole Haan; I found room when I wear this MBT.  In order to break-in the MBT, I started 30-min walk, then 45-min the next day and lately, in 60-min walk, I have blister on my feet!  With its construction, it all makes sense for its wedge makes you tilt forward and backward while in motion causing blisters on my ankles.  Ironically, this one-star I gave is due to the wedge construction for it really helps my posture while I am walking.  Considering the price of this pair of shoes, money is not well spent.  Alternatively, perhaps a suggestion to the manufacturer for a re-design of this shoe to fit for those with average M-width or N-width consumers.