Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Works great IF you can get it started

Getting this opener positioned properly on the can is very difficult. The cutter blade must be lifted but once it has been lifted the whole assembly can slide out and fall off. Getting the opener positioned so that the cutter blade pierces the can requires a real juggling act. Once you get it positioned correctly it sort of falls into place and away it goes. Unfortunately I find myself reaching for the old faithful mechanical opener most of the time because I don't like fighting with this beast. I recommend giving it a pass.