it installed on the first try in 3 minutes. I gave them away to a girl with wider width foot and she likes them. I had to put no slip rubber pads on the bottom to solve the issue. It also included a phone pop socket which i will never use. Ive only charged them once after light use each day about a week and half in. If you already have a pull-up tower though, or if youre looking for an excuse to get one, you can easily double its intended use with the help of this cheap bike clamp. It?s not that the shoe is short for the size. I always had Havaianas and know my size. I love how it is silicone so it will not break due to tension unlike plastic cases. Oh and fyi.