I bought these for my wife. She loves them. Her only regret- not getting the backless sandals instead.  In her mind, when she told me she wanted them, she thought she would use them on on day trips and when traveling but she loves them so much that she wants to slip them on all the time. If she had the backless sandals she would more easily slide them on and wear them. At this point I'm tempted to alter these and see if they still work for her without the back strap.