Based on the users' reviews, here are three cons and three pros of the app "Stack Go 3D" within the 15-word limit: **Cons:** 1. Users complain about frequent crashes and bugs, disrupting gaming experience. 2. Some reviewers find the app's instructions unclear, leading to frustration and confusion. 3. A few users mention that the app's lack of customization options is disappointing. **Pros:** 1. Many users praise the app's engaging gameplay, providing hours of entertainment. 2. Reviewers appreciate the app's ability to improve spatial reasoning and problem-solving skills. 3. Several users commend the app's innovative 3D puzzles, offering a unique experience.