These were just released yesterday, someone at my gym manages a NB store (dad used to own it) so we were able to get pre orders in and have them yesterday morning waiting for us
Started to use them part way into my lifting and instant improvement over the standard running shoes I had on... which I knew would happen and shouldn't have been lifting in my other shoes anyway.
Wore them the rest of the day felt great.
Ran with them this morning. First 2 half mile sprints then some other workout stuff/stretching/rest, back out for a 5K with the next group as it is part of a baseline everyone is doing.
I haven't specifically run a 5k outside roughly 3mile training runs and a sprint tri I did (i did a 5K with teh GF but ran part of it backwards and just goofed off).
Technically a PR today even after the sprints and other working out. Also didn't have my HRM with me and back on some medication that makes my heart rate spike bad. I was feeling great. I won't 100% credit the shoes but they helped a lot with being more efficient overall.
This is probably as close to barefoot as I'll get so just wanted to toss up a little review in this thread as a neat alternative to the 5 fingers. Bought the GF a pair also but they were a little too small so waiting for the exchanged pair, she runs barefoot on the treadmill so will be interesting to see how she likes these on the track (she runs at the Y)
Oh technically these are the trail shoes and will be using them mostly on the road, but the road ones have a decent sole and heal still so not really close to a barefoot shoe from what I understand.
They do warn you to train into them slowly and i was a little sore after the sprints but then fine after the 5K. I never put them back on though and have been walking around the office in socks all day, will be interesting to see how they fell when I put them back on in a few.
NB has a 30 day money back guarantee so anyone interested can't really hurt to try.. well unless you hurt yourself