My pair was defective, with the right shoe having one side that was higher than the other. Result was that I couldn't tolerate it for even five minutes, as it immediately caused blisters.  Another quality problem can be an uneven foot bed (apparent from other shoes I tried on). Certainly, every pair doesn't have these problems, but even those without specification errors seem more shoddy than past versions of the 608. And be aware that New Balance hasn't the slightest interest in what defects you are experiencing. Buyer beware!