In a nutshell: This (and all other) dehumidifiers are hopelessly overpriced. Gleubt not her? Then a look to what a 25kg bag of calcium chloride costs (flakes) and expects the price per kilo against time.
The active ingredient, which ensures that a dehumidification process is taking place that is nothing other than calcium chloride. And that you get in the building materials trade and also here at Amazon (incidentally, very speedy delivery!).
Just take some of the calcium chloride, there is in a shallow dish and presents this in the humid room, in the car or anywhere else where you want to reduce the humidity.
The effect is even better, because the surface is significantly larger in calcium chloride flakes, as in Tabs (as here) or compact fabric bags of others.
The calcium chloride flakes have liquefied, you also still a perfect weed killers, which also still works without great herbicides. The CC solution dries the weeds simply out (it's salt)).
Thus there is no reason, no matter which manufacturer to "treat" a profit margin of 1000% and more. This is much cheaper and even with added value.
So please do not always believe everything one tells the advertising. Most panacea are indeed beautifully packaged, but is cooked only with water (or just salt, as here;)).
I hope I have some people who are really looking for something active against humidity in the house / car, keep them to fall for these machinations.
However, if no 25kg bag (such as road salt) with you would have at home, or the sight of a shallow bowl with white CC flakes do not like, can be accessed here. The product works well, but the exorbitant extra charge, it is just not worth it.