I travel to many countries for work and have to stay in hotels. Many people I work with have reported waking up with someone standing in their room in the middle of the night or when they get out of the shower. I bought my Adalock almost a year ago and have been able to use it on every hotel door, except one. I always carry this and a wedge it for hotel door security. It has worked in four countries, including the US. As far as it being difficult to remove, you need to practice with it so that you feel confident that you could remove it in an emergency. I can remove it in the dark in less than two seconds.

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AMAZON REVIEW