Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Really finicky

We've had this charger several years, and though it does the job it is really frustrating to use. You have to set the remotes just so, or they won't charge. It takes a lot wiggling around, and even when you get them in the right spot for a second, often you let go and the light goes off... and you have to start over again!