I almost never give a 5-star review on shoes, because I've had trouble with my feet my entire life, and never really found ANY shoes comfortable, except my Chaco sandals. I have accessory navicular syndrome, occasional trouble with plantar fascittis, and metatarsalgia. The Brooks Caldera is a great trail running shoe for me. I have narrow heels, and thin, low volume feet overall, but my feet are wide in the ball of the foot area and the toes. Most shoes I've tried are too narrow in the toebox, and then if I happen find a wide enough toebox, then often the heel is too loose and slips. These are a great fit, with no heel slippage and plenty of room (width) in the toebox, and enough adjustment in the laces to bring down the volume for my thin feet. They have a stable ride, and good grip grip on the dry, loose trails I run, despite the fact that the tread is not nearly as aggressive as some other shoes. They have enough cushion that I can actually wear them on pavement too, although I reserve these for trails and use a different shoe for road. I normally wear an 8 in most brands of running shoes, and I ordered an 8 in these. If the Brooks Cascadia is too narrow for you in the toebox, like it was for me, you might give these a try.