Well, to start off, I saw a girl on Youtube recommend these shoes a year or so back and so I went on the search for them when I finally needed new shoes.  Looking back on it, obviously that was a bad lead to begin with but any who, I found them on here and decided to buy them without doing any research.  When they came in the mail and I tried them on they were so uncomfortable I couldn't believe it.  For me, the middle part of the shoe made me so unstable I almost fell when I began to walk around the house in them.  They were quite heavy and I felt super unstable and clumsy in them.  I would never want to exercise in these or even walk in these shoes.  I researched them a bit thinking I was just being weird or something but when I found research indicating these types of balance shoes can cause or lead to sports njuries, I decided I didn't want to take any chances and returned them promptly.  I think you either love them or hate them and I personally dislike them very much.  They just didn't work for me at all and I didn't want to risk an injury.