I purchased these spikes for my son who is a track (middle distance) and cross-country runner.  He likes that these are more substantial in padding and structure than his other mid-distance spikes, yet still very light and fast. Some tracks he competes on are firmer than others, and of course, some events are longer than others, so he uses these spikes when more cushioning and shock absorption are needed. So far, we have found these to be good for the 1600m track, 3200m track, and 5K cross-country races. Some reviewers have mentioned these run small, but I personally feel they run true to size - my son wears the same size in Brooks training shoes, Under Armour mid-distance spikes, and these. Keep in mind that spikes are usually worn without socks or with very thin sock liners, and they are meant to fit more snugly than training shoes; they will fit close to the foot.