as noted by some of the shoe here, apart from the otherwise relatively flawless processing has a hard, protruding seam on the verse (s). This leads after a short wear to mild pain and redness at the verses. A blistering I do not consider excluded.
Unfortunately also brought tips reviewers no remedy for this problem, which is why I unfortunately have to return the shoe.
Who is willing to venture an "experiment" and here along the lines to process "must suffer who want to be beautiful" is willing to try out these shoes.