Based on the users' reviews, here are three cons and pros of the Mystery Cube app: **Cons:** 1. "Glitches and bugs make it frustrating to play, frequent crashes are annoying." 2. "Lack of variety in puzzles and levels, gets repetitive quickly." 3. "Not enough guidance or hints, can be too difficult for beginners." **Pros:** 1. "Engaging and challenging puzzles that keep me coming back for more." 2. "Simple yet addictive gameplay that's easy to pick up and play." 3. "Lovely graphics and animations make the experience visually appealing."