Based on the user reviews, here are three cons and pros for the app Flex Balls 3D: **Cons:** 1. **Limited gameplay variety**: Some users find the game mechanics and levels too repetitive and lacking in innovation. 2. **In-app purchases overwhelming**: Frequent pop-up ads and intrusive in-app purchases can be annoying and disrupt gameplay. 3. **Poor graphics and sound**: Some users experience lag, pixelation, or poor audio quality, takeaway from the overall experience. **Pros:** 1. **Addictive and engaging physics puzzles**: Users praise the game's challenging and entertaining physics-based puzzles, keeping them hooked. 2. **Easy to learn, hard to master**: Simple controls and intuitive gameplay make it accessible to new players, while Expert levels provide a satisfying challenge. 3. **Immersive and relaxing VR experience**: Positive feedback from VR users on the app's immersive and calming atmosphere, perfect for unwinding. Let me know if you'd like me to adjust anything!