I have been using this from last 2 months, and frankly speaking they have proved out to be pretty good.
I was using an another brand earlier but then once I could not find that particular brand in the market so for just sake of getting a mosquito coil I bought this, but this came out to be good one. Basically what I have come to know is that all mats use the same chemical and over all they last only for 5-6 hours.
But actually if you use them I the right way then they tend to be very effective, you need to put the mat on the coil and put on the machine say 30 min before sleep and you need to close the door so that the mosquitoes don’t fly to other room because of the smell of the mat.
Over all it’s a good mat if used properly.