Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Gamers, avoid this mouse!

I miss my 3.0Where the side buttons used to be easily clickable without moving your hand, the newer 4.0 makes it difficult to click and control the mouse at the same time. This is not a mouse for gamers.Another major problem is the wheel button. This is a major function button for me in many games. Now it responds 1 out of 3 times (if that!). I click and click... and nothing happens.