All out, the biggest brand out there for mosquito repellant machines, is really not that effective. And now it comes with a gimmicky slider too.
Although it is simple to use, the slider moves up and down very easily, and the refills are easily replaceable but it’s real job, which is to keep mosquitoes out isn’t really perfomed very well.
The slider, in real life usage, doesn’t feel to be doing anything at all. It just moves around.
Also, what it emits is poisnous to us humans as well, so people should not be staying in immediate contact with the machine in use
Cost of the machine isn’t really a matter.
More often than not, it rather feels as if the mosquitoes come in more quantity when the machine is turned so I would not recommend using it.