Just got back from a solo trip and this little red door jammer was my constant companion. At first glance, it seemed too simple to actually work, but boy was I wrong!

The aluminum alloy feels super sturdy in hand, and the rubber base grips most floors really well. Installation takes literally 3 seconds - just slide it under the door and twist the knob. The peace of mind it gave me in sketchy hotels was priceless.

That said, there are some limitations. Like other reviewers mentioned, it struggles on carpeted floors (my Vegas hotel experience matched this exactly). Also requires that perfect 0.19+ inch door gap - measured mine with a coin first.

For the price, I'd say it's worth throwing in your travel bag. Not 100% foolproof security, but makes breaking in way harder and gives you precious seconds to react. Plus it's so small and comes with its own carrying pouch!

Pro tip: Practice setting it up at home first. Saw some negative reviews from people who probably didn't install it correctly. When used right, this thing is a game-changer for solo travelers.