Based on the users' reviews of the Glass Puzzle app, here are three cons and pros: **Cons:** 1. "Lack of variety in puzzle types, gets repetitive and boring quickly." (15 words) 2. "Glitches and crashes frequently, frustrating experience." (15 words) 3. "Too many ads, can be overwhelming and distracting." (15 words) **Pros:** 1. "Challenging and engaging, perfect for puzzle enthusiasts." (15 words) 2. "Unique gameplay mechanics, keeps me coming back for more." (15 words) 3. "Beautiful graphics and soothing music, enjoyable experience." (15 words) Note: The text is based on a general summarization of the user reviews, trying to capture the main concerns and praises, but the exact wording may vary slightly depending on the specific reviews.