Ah, where to start? The beginning is usually a good place. I’ve been running in NB 1400s since v1 came out a few years ago. They are a lightweight, performance neutral shoe – and they look and feel fast!
While the shoe has changed from v1 to v2 to v3, the general fit and feel have remained the same. They provide a 10mm drop in a lightweight (5.5 oz) format. I’ve found them to be perfect for track workouts, speed work, tempo runs, and race day. I do find the cushioning to be lacking for long runs (anything over 12 miles or so – as I’m currently marathon training) and I find that the ball of my foot begins to feel bruised if I run long distance in them.
v4 is scheduled to come out late spring/early summer 2016 – I’ve seen a sneak peek and they look as though they won’t disappoint!