I never had a simplisafe motion sensor get set off by a fat old cat for the years they coexisted.
A 63 gram conure parrot flying right in front of one, will, however, set one off.
One of the great things about this system is that you can set it up to have triggers immediately set an alarm, or just send you a message.
So mine has all entry points covered by sensors, and the motions are used as verification in some settings. In others, like when we know the house is empty and/ or the birds are not free roaming, those motion sensors are set to trigger full alarm immediately.
And you can do this from anywhere you have internet.
I have disabled a trigger setting falses (the parrot) from vacation before.
It’s great little setup, but if I were buying one, I’d probably spend the money on the brand new version since this is a thing you keep around and don’t swap annually.
also re cameras their monitoring and recording is pricy. Image quality is good day or night, however.
And ANOTHER nice thing- I can pay to monitor cameras and record when I’m gone for a vacation, without having to pay for a whole year.