I was initially skeptical about these because of some of the reviews. I would speak with people and it seemed as if you either love them or hate them. Well, I am glad that I took advantage of this Amazon Deal of the Day! I did follow recommendations and go a 1/2 size up. I am solid 8.5 in sneakers, but I am glad that I got the 9. They were initially snug, but after walking in them for a few minutes they softened right up. They are just a wee bit loose in the toe now, but nothing that will cause discomfort or pain, by far. These are very comfortable and I do believe that they improve my posture and help me burn more calories when I'm walking. It's usually a power walk. I will say that the one thing that doesn't hurt are my feet. I would recommend that if you are barely an 8.5 for example, a size 8.5 in this shoe should work fine. Just know that it will be slightly snug the first time you try them on, but walk around a little and they'll be fine. As far as running, I have other shoes for that, so I'm not sure how these would do, but I will try these and see how they work. The only regret I have is not buying two, since the price has increased.