Just wondering if anyone uses them. We've been in our house 4 yrs and the mice come in every September and again in spring. I block holes, put down poison and get paranoid about every rustle and they're gone in 3 weeks or so. But now I'm 35 wks pg, they're back and they've been scattering the poison about which worries me. Got a quote today for £85+vat for one visit from a pest control place, or a six weekly visit for a year for £400. Is it worth it? Any experiences?