First off, let me say this little red gadget has become my travel must-have. As someone who frequently stays in hotels and Airbnbs alone, the peace of mind it provides is priceless.

The triangular design really works wonders - I've tested it against my full body weight (and I'm not petite!) and the door didn't budge an inch. The rubber grip holds strong on everything from hardwood to carpet.

Setup is brain-dead simple: slide it under the door below the handle, adjust the foot until snug, and give the door a test push. Even my tech-challenged mom could use it without instructions.

Now about that alarm feature... While some users report issues, mine worked perfectly during testing. The piercing sound would definitely wake me from deep sleep and scare off any intruder. Pro tip: Make sure to insert fresh batteries before your trip.

My only gripe? It's slightly bulkier than I expected - takes up about as much space as a thick paperback in my suitcase. But considering the security benefits, I'll gladly make room.

Whether you're a solo traveler, parent wanting extra protection for kids' rooms, or just security-conscious, this $20 investment could be life-saving. It's already earned a permanent spot in my go-bag.