Good quality construction and very comfortable fit for the sole on the bottom of the shoe. Some reservations about the felt material in terms of wear over time.

After so much hype about these sandals, I decided to try them... and I was disappointed. They hurt my feet, the sole is very hard, the sole is hard and there is no proper width/length ratio in the sizes. I tried 3 consecutive sizes to find a relatively acceptable size.
If you are looking for comfort, especially if you have a BMI>18, then stay away.
We're not even discussing long walks and posture.
If you like their "social acceptance" or if you have a BMI<18, then you might make a good choice. Another marketing product that succeeds with those who simply haven't tried other similar ones. In the same price range, there are more beautiful (ok, subjective) and DEFINITELY MORE COMFORTABLE and HIGHER QUALITY options. Before you buy them, definitely try others.

Birkenstock never disappoints, the strap at the back provides extra security to prevent the foot from slipping