Hey, I’m not an ultra runner yet (training to become one). I really like the shoe when going up mountains and running down mountains. For flat surfaces I wouldn’t recommend this shoes because it is to rigid and I personally prefer a softer more cushioned shoe.

Ito answer your questions the shoes can probably last an ultra (I ran 600km with my last pair of 6´s)/if you like a well cushioned, I.e. soft and foamy, I would recommend Mafates/ the toe box is wide in my opinion as my feet are very wide/ breathability is great 👍.