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The takeaway:

In conclusion, Brooks has a shoe with a great deal of potential in the PureDrift. The first incarnation has some shortcomings that I was able to remedy with an insole swap, but I think only some minor tweaks would be required to take this shoe to another level in future incarnations. I’d redesign the integrated footbed to remove seams along the margins, soften the sole just a tad, or include a slightly beefier insole (like the current PureCadence 2 insole). With the tweak I made, I foresee this shoe remaining on my active rack for quite awhile!

The rest of the review is here.