If you think that when your various and assorted detectors are defective every time they go off ... why have them? Go with your instincts and see were that gets you.
They can have a high failure rate. Plus, very few home owners know that both CO and smoke detectors have an expiration date, It is a real chore to even find the date on a detector still in the box, mounted on the ceiling requires removing it and removing at least the cover.
How many homeowners clean their detectors regularly as per the manufacturer;s instructions?