About a year a half ago I became aware of the performance line of running shoes from Skechers. The Go Run from Skechers was a great debut (you can read more of my thoughts on the shoe here). Skechers updated the Go Run, with the Go Run 2. I think Skechers did some really smart things with the updates to the Go Run series. The first (and most noticeable update is the structure of the sole of the shoe. The previous model felt like it had no heel, when standing you literally felt like you were rocking forward and back It was wonderfull to run in, really forced you to land mid-foot, but standing in them was always a little awkward. The 2’s have solved this problem, it no longer has the rocker feel, but still is only a 4mm drop. The result is a shoe that still feels comfortable to stand or walk in, but also has the same great feel to run in. The out-soul itself is slightly different too with some reinforced lugs on the bottom for more durability on the sole. I was able to get about 250 miles out of the original Go Runs, I am currently at 200 miles in my Go Run 2s and they are still going strong, I would guess I am going get to get about 350 out of them, if not a little more. A third update that I have noticed is that material for the upper breaths a lot better than the first Go Runs. My feet tended to get sweatier than normal in the original Go Runs (a detail, I am sure you are excited about hearing), but in the 2’s I have had no such problem. Those are the 3 most glaring differences from the previous model. The rest of the key features of the Go Run series are very present. It is an extremely light and flexible shoe. You can feel your foot contact the ground, and are able to feel your foot when running with the roomy toe-box. Despite being a really light and flexible shoe the out-sole material is extremely soft and has a really nice combination of cushion but is also still pretty response for fast running. Overall I think the Go Run 2 is wonderful shoe. It would be perfect as a trainer for someone who likes a light, flexible shoe that is low to the ground, as a shoe for someone looking to transition to more mid-foot running, or as a racing flat for someone who likes a little more shoe to race in.