Based on the users' reviews of this app, here are three cons and pros in English, with each item limited to 15 words: Pros: 1. Users love the app's user-friendly interface, making it easy to navigate and use. 2. Many users appreciate the app's ability to help them find and download technical documents quickly. 3. Positive reviews praise the app's accuracy and effectiveness in providing relevant results. Cons: 1. Some users find the app's search function to be slow and unresponsive at times. 2. A few users complain about the app's inability to filter results by specific keywords or categories. 3. Some reviewers report encountering errors or crashes when using the app. Please note that the reviews on the App Store can be subjective, and the pros and cons listed above are based on a general summary of the reviews.