I have over 20 bikes and I store many of them in a small room and that would definately be a useful device for someone like me. That being said, I wouldn't buy one, waste of money to me. I have better stuff to spend it on. Also I would need about 15 of them to make them useful.

I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!