I really like the idea of a portable, small, quiet, reusable dehumidifier. One thing that struck me as odd is the fact that the color changing crystals differ from box to box. I have two of these. One goes from orange to green, the other goes from blue to pink. But these are super simple and easy to use, and you don't hear a peep out of them. They start working right out of the box, just set it where you like it and watch every few weeks for the crystals to change color. The one downside to this, is that you have to plug it in somewhere to recharge.. I'm not sure how it works, but unless you have an outdoor electric socket, doesn't it defeat the purpose of dehumidifying if it's just gonna release it back into your house again? I live in an apartment. I plugged it in out in the hallway of the building..