Hi,
These are my initial impressions. I was finding something to replace my Nike epic react. I normally wear size 10.5 to 11. Tried the men's version of Nike Peg 37 , size 10.5 I found a little harsh on forefoot foot, fairly firm and felt it a little hard to transition at slower paces , the upper fairly warm. Tried the woman's version (Peg 37) size 12, approx 10 grams lighter. It seems a little softer overall (like epic react), the front was softer and much smoother in its transitions even at slower paces and seemed a little more pop and flexibility and the upper more breathable. I prefered the epic react to the mens version of peg 37 but I think I prefer the womans version of the peg 37 over the Epic react. It adds a bit of pop at toe off (air zoom unit) and I do about 20 sec per km faster.
Cheers
Steve