I was running using a different brand of shoes and I thought I had finally found enough support for my knees. I decided to try this one as recommended by someone I chatted with on nike.com. The other brand I was wearing is notorious for comfort but also super ugly, and I wanted a more stylish shoe. I found this to be a much better fit and a lot more comfortable than my other shoes. The toe box seems tight at first, but because my toes don't move around, it has reduced the pain caused by my bunions. In just the first week wearing them, I ran my fastest mile and fastest 5k. I'm a beginner runner, and just started training for a half marathon. I've run mostly on a treadmill so I can't speak about durability, but I'm super impressed with these shoes and I think it's worth the money to have a shoe that makes your runs enjoyable.