After testing this aluminum alloy door jammer across multiple scenarios, I'm torn between praising its convenience and cursing its limitations. The red anodized finish gives it a sleek, almost tactical appearance that feels reassuring when you're alone in a sketchy hotel room.

On smooth tile floors, this thing is a BEAST - I literally threw my body weight against the door and it didn't budge. The rubber grip bites into hard surfaces like a pitbull. Installation takes 3 seconds: slide under door, twist knob until tight. That satisfying 'thunk' when it locks gives instant peace of mind.

But here's the brutal truth - carpeted floors turn this security device into expensive decor. During testing at a Vegas-style hotel with plush carpeting, no amount of wrenching could prevent slippage. The manufacturer's 0.19" gap requirement also eliminates many older doors from compatibility.

The quick-release feature works brilliantly during fire drill tests (yanking upward pops it free instantly), though one tester reported the mechanism failing after repeated use. For college dorms or apartments with hard floors? Absolute game-changer. For thick carpets or uneven thresholds? Save your money.

Pro tip: Always test installation BEFORE needing actual security - that momentary fumbling in the dark could be dangerous. While not perfect, when conditions align this $25 gadget delivers $100 worth of security confidence for solo travelers.