I have had these flips for about 3 weeks.  I absolutely love them.  When I take them off my feet feel let down.  I have had chronic Achilles tendinitis with a bone spur that the tip has broken off of, so I really needed a good open back shoe to wear.  My feet just absolutely love these, no pain at all while walking with them.  My one complaint is that I did have problems with the straps.  They did cause breakdown on the top of my right foot.  I used tape over the irritated area and only wore them 2 or 3 hours a day.  It took about 2 weeks to wear them in and now they don't bother me.  I have narrow feet so I was surprised to have this issue. So if you get them and that is an issue for you, hang in there it gets better.