Blown away by these shoes. Midsole is superb - a perfect balance between cushion, support and speed - these shoes are FAST - I'm not the most seasoned trail runner but my segment times on a local trail are approaching others using carbon-plated racers. I've used on fire trails and sandy / loamy bush tracks in wet and dry and the outsole / lugs handled these conditions with ease. Love the wide Altra-style toebox in such a speedy shoe. Regarding fit, width in heel and midfoot is good to generous - but length-wise (based on my other shoes) these definitely run a half size small. I'm usually an 11.5 (US) - occasionally an 11 - never had a 12 - ordered an 11.5 but feel I could almost have gone a 12 - switching to lower-cushioned socks and really locking down the midfoot has mostly fixed this and prevents toes from occasionally approaching the end of the toebox, not that there were any hard or harsh elements to the upper. The upper material is unique and works really well, very comfortable from heel to toebox and no water intrusion noticed after splashing through the occasional wet section. These shoes are so innovative that they are made here makes me proud to be an Australian. They are quite simply the best trail shoes I have ever worn.