Instruct: Classify Amazon reviews into positive or negative sentiment
Query: I'll never go back to a mouse!

I have been using a Logitech Marble Mouse for the past 6 or so years and never intend to go back to a traditional mouse. I find the marble much more precise than a mouse and it's great for our desk with limited space. Keep in mind that there is a bit of a learning curve with trackballs as you're manipulating the cursor with a completely different set of movements so it's bound to take some time.