No Effective at all. I have paid £180 for nothing. I have ordered the service to remove bumblebee which i have in the ceiling in the bestiom and ask to relocating them. The men came and said that they do not relocating bumble bee just honeybee . They decide to kill bumble bee as there were No choice. The men sprayed the nest and told me that they will be dead. After 8 days the activity of the bee were the same . The men came again sprayed and said that should be done. That doesnt resolve the problem because the bees are still there and I have the problem. Very disappointed.