Based on the users' reviews of the Letter Stack 3D app, here are three cons and pros in English, with 15 words limited for each item: **Pros:** 1. Users praise the app's unique 3D puzzle concept, providing a fresh twist on word games. 2. Many reviewers appreciate the app's challenging levels, keeping them engaged and entertained. 3. The app's colorful and visually appealing graphics receive widespread praise from users. **Cons:** 1. Some users find the app's controls unresponsive or glitchy, leading to frustration and disappointment. 2. A few reviewers criticize the app's lack of features, such as daily challenges or leaderboards. 3. Some users experience issues with the app's performance, including slow loading times and crashes.