First I saw advertisement in tv then only we decided to use it.So, we bought that box prices around Rs.33.It really gives better protect from the mosquitoes.
Its really gives good relief from smoke but works really very good.
We use it in the evening time because more mosquitoes come in that time then we lit this coil and after 10 minutes we will get the better relief.
The cost is also low when compared to the other coils.It mainly contain the active filters technology hence it works very effectively when compare to others.
It cannot harm to us but some coils are giving more smoke so we cannot breath properly.Its very easy to use there is no terms and conditions for using it. Try it and then get benefits from it.nJust use it once.