I bought these as a replacement for the 1223 model, which I loved.  While the fit is the same and I like they way they look, something is just off when I run in them.  They are light and the width is perfect, but either my foot changed in the past year or something is different in this model that makes my feet hurt, pretty much right off the bat.  I can still run in them, and don't have any issues post-run, but my runs just aren't as comfy as they were with the 1223.