I tried the bait after seeing so many advertisements and bought it. Depending on what you have in mind, it may be worth it. It is quite good for keeping an object clean. If it is already very dirty, it won't help you much. The main "big" brush is excessively soft and doesn't help much in cleaning a keyboard that is filled between the keys, for example. In the small tool, which I don't know how else to call it, supposedly for details, there is a small brush that quickly "fills" with dirt. The rubber tip is again excessively soft and you can't "scratch" off dirt. I regret not getting a metal one to try, which was available as an extra accessory, maybe it would have helped more. The back surface, which is supposed to be good for the phone, is irrelevant. All in all, as we say in my village, if your object is already in a clean condition, cleasy will help it stay clean (hairs, dust, fresh little crumbs that didn't stick to a keyboard, for example). In a different case, just sacrifice a toothbrush with a little alcohol and you will have better results.