I purchased these for boxing, since the lateral movements caused blisters when I wore my regular trainers. These are more minimal with a lower toe/heel drop, so they work well for lateral movements. I also wear these for weight training.
They fit well in the toe box and heel. I have a narrow heel and I absolutely hate feeling my heel slide up and down in shoes. I find that New Balance and Nike both have narrower heels in their shoes, so both brands feel like the shoes are cupping my heel and don't go anywhere. Very nice.
The one downside is the tongue. It's a burrito tongue, meaning that it's connected all the way down to the sole and won't shift to either side while exercising. Good. However, the tongue is a little stiff, and rubbed and caused blisters on the top of my foot/ankle area. The skin there eventually toughened and now it's fine. But the first few wears were a bit uncomfortable, unless wearing taller socks.