First of I wanna say there is literally no excuse to leave your child in the car not even for a minute.

Pros:

• reminds you if you leave your child in your car (again I can't even imagining forgetting it in the car though)
• still this is a good tool to prevent that and potentially save lives
• really easy to set up

Cons:

• again in a perfect world I could not even imaging a use for this but yeah
• massively overprice (for a simple sensor with notifications) kinda shows the real intentions from the inventors in my opinion
• receiving notifications within 1 to 2 minutes is a really vague statement