I normally wear 8 AAAA shoes.  After wearing 8 2A Asics 2150 with Thorlo moderate socks and my big toe close to the end but worked OK, I decided the 8.5 2A would be best and they are just right with Thorlo thick hiking socks.  The thick socks allow me wear the AA.  They do not even slip on the heels like others have.  I felt lucky to find the solid black which I wanted to go with my mostly dark workout pants, as well as the rest of the day with other clothes.  I followed another reviewer's suggestion to use a black marking pen to cover the white reflector things on the shoes which made them look funny for everyday wear.  White shoes and the wild colored ones are yug to me.  I don't run, just needed some shoes to wear to the gym and all day.  So far athletic shoes work best for me.  There are newer models replacing this 2170 and I hope one day when new ones are needed to find another one that works this well.  I alternate the two pair.  Some reviewers for the 2170 thought it wasn't as good as the 2150, but they seem about the same to me.  Often reviewers seem to think the one replacing an older favorite model are not as good.

After reading the other reviews and seeing that some people thought this 2170 runs narrow, I quickly grabbed them.  For someone who usually wears a 2A, they could be too narrow unless thinner socks are worn.  My only complaint is sometimes the tops of these and other shoes rub on my hammertoes.  Just wish the manufacturers would leave more room at the tops for toes like mine.  They would still look stylish enough.  I also wish more people writing reviews would give more detail, size usually worn, etc. to help the rest of us know what to order.  It's still a calculated guess but this time it worked out great.