These sandals are the only ones that don't "hurt" me, out of all the ones I have tried naturally. This is due to 3 reasons:
1) They are adjustable with Velcro straps in 3 places, meaning everywhere (on the top of the foot and front-back on the ankle).
2) Underneath each adjustable strap, there is a layer of soft fabric, which can be seen in the pictures.
3) The sole is very soft and flexible.

As for the size, my foot has a maximum length of 22.5 cm and the size 36 fit me perfectly, while in most sandals, size 36 is too big for me.

Overall, they are perfect, I only see positives, they are much better than what I could imagine for a sandal.