Based on the user reviews of the app "Agent Stopper", here are three pros and cons: **Pros:** 1. Effective at blocking unwanted calls and messages with user-friendly interface. 2. Excellent app for blocking spam calls and preventing phone harassment. 3. Simple and easy to use, allowing users to customize their blocking settings. **Cons:** 1. Some users experience issues with app crashing or freezing on their devices. 2. Limited features compared to other similar apps on the market, lacking advanced capabilities. 3. Occasional trouble with identifying and blocking spam numbers effectively, leading to frustration.