The first tour I did with the shoe on the Ahr. about 15km with a total of approximately 500 meters (several smaller ascents and descents). No pressure points, no friction, NO flat tire after a short break, I would have run to get rid of the most.
The shoe can be put together quite firmly - to disrupt the blood circulation without. This gives us a really good grip.
Nachschnüren after 2 Km is mandatory.