These are great. They're very simple, but do the job well. I bought them for cleaning up wires in an audio rack, but now I've found that they're handy for keeping cables need and preventing tangling when in storage.
Every time I put an order into Monoprice I always find myself ordering another 20 of these little things. They keep my cords all organized in my laptop bag very well. From the video game drawer, to garage... I have them on everything.
PROS: - cheap cost - easy to use - organizes cords well - different colors avail