Based on the users' reviews of the Stair Man app, here are three cons and pros in 15 words or less: **Cons:** 1. Many users find the app's pace too fast, causing mistakes and frustration. 2. Some users report poor customer support, leaving unresolved issues unanswered. 3. A few users note the app's lack of customization options for individual preferences. **Pros:** 1. Most users praise the app's engaging design, making learning stairs enjoyable. 2. Users appreciate the app's clear explanations and step-by-step instructions. 3. Many find the app's interactive features helpful for retaining stair-related knowledge. Please note that these conclusions are based on a snapshot of the reviews at the time I accessed the app's page, and opinions may have changed since then.