Based on the user reviews of the app, here are the pros and cons: **Pros:** 1. **Engaging and relaxing puzzle experience**: Users enjoy calming brain training exercises and soothing colors. 2. **Variety of levels and modes**: Innovative puzzles and modes, including timed and untimed options, keep users engaged. 3. **Satisfying progress tracking**: Users appreciate the ability to track their progress and earn rewards. **Cons:** 1. **Too simple for advanced players**: Some users find the puzzles too easy and lacking in challenge for advanced players. 2. **Limited game modes and levels**: Users would like more variety in game modes and levels to keep the experience fresh. 3. **In-app purchases and ads**: Some users are frustrated by the inclusion of ads and the need for in-app purchases to access full features. Note that these points are based on a summary of the user reviews and may not reflect the opinions of all users.