) I also liked the fact that this particular device has a replaceable battery. These are much, much more sturdy, better looking, and Im sure they will last a long time. Not as bright as I expected but will do the job. I bought one from Amazon as soon as I could rationalize the expense. This is the THIRD pair of Columbia flip flops I?ve purchased. 5s in the center. These were the perfect size for the little bit of wall I still had available and they were very easy to install. I can only hope that future updates will be relatively simple through the app. If I had any negative to say about the shoes is that the faux suede material collects dust very easily. Cushion is a little on the thin side.