We found the service provided to be very superficial and therefore poor value for money. Failure to detect several clear points of access for mice from the foundations into the house. The use of a type of poison in the bait, which (we are told by the experts whom we were obliged to consult since your treatment was ineffectual) is allegedly illegal. We paid a bit more than £228 (two visits) for a total of around an hour of "work" - rather less actually. No suggestion of a final, follow-up visit to assess the effect of your efforts. I'm afraid we would not recommend you.