Based on the users' reviews of Balance Ball 3D Ultimate, here are three cons and pros in English, limited to 15 words each: **Cons:** 1. Some users found the physics engine too sensitive, making the game difficult to control. 2. Others experienced lag and frame rate issues on older devices. 3. A few users felt that the game lacked variety in its levels and gameplay mechanics. **Pros:** 1. Many reviewers praised the app's realistic 3D physics and responsive gameplay. 2. Users appreciated the game's challenging levels and precise ball control mechanism. 3. The app's smooth graphics and animations received widespread acclaim, with some calling it "mesmerizing".