Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Essential for round-the-world travel

I just finished traveling around the world for a year, and this power strip ranks among the most useful things I packed.If you're serious about extended travel, this is a must-have. You don't realize how essential it is until you're in a hostel in Uganda with one outlet and four things that need to be charged. It's cheap, it works, and I even received nods of admiration from other, more experienced travelers.