This product has worked for me every time. I had someone be dishonest and tell me they were cooking bacon and that caused the device to go off. The next day after they checked out, we discovered they had burned up a frying pan by accidentally leaving the stove eye on, and that had smoked up the property for over an hour. By me contacting the guest, they were able to go inside and resolve the situation before it got worse.
So this device not only alerts you of recreational smoking, but also fire hazards. It also alerts you when the incident clears up which is very helpful.
For us, the device has never went off due to regular cooking but it will alert you if something is about to be or is on fire, such as a stove eye being left on and burning up a pan.
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