Let me tell you about this little lifesaver I've been carrying around - the Portable Alarm Door Stopper. As someone who frequently stays in hotels for work, this has become my must-have travel companion.

The first thing that impressed me was how ridiculously easy it is to use. Just slide it under the door (works on gaps from 0.2 to 2 inches), adjust the foot until it's snug, and boom - instant security. I've used it in everything from sketchy motels to fancy Airbnbs, and it gives me peace of mind every time.

When my hotel neighbor accidentally tried opening my door at 3 AM (probably drunk), that ear-piercing alarm scared both of us half to death! But that's exactly what I wanted - immediate alert and deterrent. The sound is loud enough to wake you from deep sleep but not so loud it'll damage your eardrums.

The build quality surprised me - this isn't some flimsy plastic junk. It's got serious heft to it, yet still fits easily in my carry-on. I've had mine for eight months now, surviving being tossed around in luggage and used on probably 50+ doors with zero issues.

Pro tip: It works best on inward-opening doors (which most hotel rooms have). The only minor downside is remembering to remove it before opening the door from inside - learned that lesson the hard way when rushing for room service!

Whether you're a solo traveler, live in a ground-floor apartment, or just want extra security at home, this $20 gadget delivers serious bang for your buck. After testing dozens of travel safety products over the years, this one earns a permanent spot in my go-bag.