Seen one roach in three years at current location. I would think they stay behind the fridge/cabinets on account of the felines, and im ok with that compromise. My moms house is over 100years old and during winter mice move in. I like a combo of good ole fashioned snap traps (w/ pb obvi) and good ole fashioned dcon poison. I dont worry about a poisoned mouse dying in the walls and stinking up the joint, they decompose in a few days.