My son has a pair of NBs with a BOA system and I love how easy it is to adjust the fit. This part of this shoe is 100% amazing. I also really like the grip of the sole and I never feel like my foot slips in the shoe. The only problem is that it is very difficult to put shoes on. My socks are too high because the shoes pinch when I put them on. I would like the hole to be a bit bigger or more flexible. An added bonus, they make my feet look tiny for some reason.