Its effective and I really appreciate the product as now we dont have a single cocroach or insect at home now. and it is harmless also and it has no odour also. Its really effective of course it is very costly but effective. we paid 2700 rs for that for annual subscription .
They have to come thrice a year a now. After its shot it started showing the effect after a mon or so.but then everything was cleared and no need of removing your stuff from your cupboards and all. This is effective.