I gave this shoe a 5 because it is the best in the Vivobarefoot range for training. I use these shoes in the gym and they give me a solid and secure connection to the ground while using weights. They are excellent for yoga and martial arts as well. I don't run a lot but they easily stand up to a 5 or 10 mile walk. The uppers are soft and flexible with a wide toe box that lets your feet move properly as with all Vivo shoes. I already have noticeable wear on the soles of the shoes. These shoes wear quicker on the soles than the other Vivo shoes but that is a trade off for their extreme flexibility. I like these shoes as they can be worn without socks and the air circulates well. They are not for the beach as sand collects in them. I found my shoes rubbed on the top arch of my foot until I popped out the rubber insert under the laces. This is not needed and they are much more comfortable without them. All round these shoes are sensational for training and walking and the occasional run that I do. They will fill most runners needs. Don't expect the soles to last a long time if you're running on the road a lot. I like them very much, and the size was correct. I own 3 different styles of Vivobarefoot shoes and these fit the bill for training.  These shoes are so good that I have just bought another pair. I doubt the runners out there  will get anywhere near 400 to 500 miles out of them but the comfort is sensational. My first pair are already worn down a lot on the sole and I don't run a lot. I walk, train with free weights and do martial arts and never take these off. They are that comfortable. I walk to appointments in them then change when I'm at my destination. In my opinion these shoes are the best in the Vivobarefoot range. Try walking in the rain with these bad boys. A whole new feeling. The water comes straight out of the holes. It feels terrific. These are my favorite shoes. Great for warmer seasons. Don't wear socks with these if you can help it. These shoes are a whole new experience. I have bought a second pair of the same Vivobarefoot men's ultra 2 weeks ago and I am wearing them now. I bought the second pair 4 weeks after I got my first pair. They are that good, really good.  I doubt the soles will last too long but that is not a problem. I still give the shoes 5 stars. They still are the best in the Vivo range. I would like to add to this review one extra important comment. I was put in orthotics for 12 years to help my running. They completely ruined my leg inside tendons so as my walking was uncomfortable. I also used to pop my knee out on take offs when surfing. These shoes and others in the Vivobarefoot range have bought my body back into  perfect position and alignment. I stay away now from any inserts or orthotic devices and my training, walking, and surfing has seen huge gains. They are not just for running.