Based on the users' reviews, here are three cons and pros of the app "Mystery of Diamond Hidden Game": **Cons:** 1. "Too many ads, ruining the gaming experience, and difficult to skip." 2. "Some levels are too hard, frustrating and demotivating, need improvement." 3. "Limited hints, making it hard to solve puzzles, wish for more guidance." **Pros:** 1. "Engaging storyline, love the mystery and detective work, keeps me hooked." 2. "Beautiful graphics, vibrant colors, and fun animations, visually appealing." 3. "Variety of puzzles and challenges, keeps the game fresh and exciting." Note: The reviews are based on the Apple App Store reviews and may not reflect the entire user base's opinions.