Let me start by saying these alarms are LOUD. Like, 'wake-the-neighbors' loud. The 90dB alarm definitely does its job of scaring off intruders (and startling me when I forget to turn them off).

The installation is stupid simple - just peel and stick. But here's the catch: that adhesive is weaker than my willpower at a bakery. Within days, several units fell off my sun-exposed windows. Pro tip: add your own heavy-duty double-sided tape.

I love that you get 16 sensors - enough to cover every entry point in my house with spares. The wireless design means no messy wiring, but you'll need to supply AAA batteries (not included).

Major flaw alert: They don't work well on crank windows or uneven surfaces. I had to get creative with placement on some windows. Also, about 25% of the magnets felt cheap and weak straight out of the package.

Final verdict? For the price, they're decent for basic security. Just don't expect premium quality. They'll alert you to intruders, but might also alert you when they randomly fall off your windows at 3AM.