After 600km of racing use on tough terrain, in Ultra races, vfut, ntr, Terra, Transilvania Ultra etc., I have to say that this shoe is truly the best I have ever worn. It has amazing grip, very good shock absorption, feels like a fast shoe, dries very quickly if it gets wet, and after so many kilometers it doesn't wear out like other Altra shoes. I will definitely buy it again for racing. Its flaw is that because it is 0 drop, at 600km it feels like it now has a negative drop, the material at the back has compressed a lot, but the shoes more than paid for themselves and made me look good.

Very comfortable, good grip due to Vibram and finally better build quality, after 200 km they have minimal wear.

Very good move by ALTRA with this new version. Very good shoe. Midsole that provides a faster feel on the trail and a more pronounced rocker that helps with faster paces. Incredible Vibram outsole that has never disappointed me on the mountain even on wet rocks and has held up after crazy abuse (about 600 km including rough terrain and after being retired, daily use). It doesn't have ALTRA's spacious toebox (unfortunately) but even so, the average runner will find it quite comfortable. In the midfoot, it holds quite firmly so even at 29mm, you will find it quite stable without tipping. The only downside is the quality of the outer mesh which showed wear quite quickly. Nevertheless, the sock never showed through because it has another layer inside like fabric. Overall, I would recommend it as an alternative to a more comfortable trail shoe, which is still zero drop but supports faster paces.