I have been using the Lone Peak 4.0 since November 2018, and have clocked just under 700k in them, using them for the Addo 50 miler and 8 hour challenge (total 63k), as well as for all my training on the trails. These shoes honestly feel as if you can run forever in them without any discomfort or pain. The grip is still around 75% of what it was, demonstrating the superior strength of the outer sole. IThe upper is still in excellent knick – and I have not been kind to them! For longer distances – long hikes, ultra’s – I would recommend this 100 %. FOr something a bit more for the technical stuff, I would recommend the superior or king MT’s, although the Lone Peaks are no slouch either!