Owned these in a UK 9.5 for about 6 months now and I've ran 370km in them! Been my go to workout shoe this year. Compared to other NB shoes I went up half a size as they are a snug fit!

Light and comfortable upper with a lively midsole and just enough cushioning to not leave you totally beat up! The midsole design leads them to suit a mid-forefoot strike and I'm not sure how they would hold up to a heel strike.

I've used them for interval work, fartleks, tempo runs and faster long runs up to 10miles. I think they could probably stretch to a half marathon but not sure they have enough cushion for longer (certainly not for amateur runners, pros would probably be fine!). Been a great fast training / short distance race shoe to compliment the Vaporfly 4% and New Balance Fuelcell TC I have for half - full marathons.

I would say mine have lost some of their 'pop' in the last 50km or so, running at 5k pace is more of a slog than it used to be.

I've enjoyed them so much I recently bought a second pair in NB's summer sale so think they will be getting broken in soon!