Based on the users' reviews, here are three cons and pros for the Slitherlink app: **Cons:** 1. **Lack of challenging levels**: Many users find the levels too easy and repetitive, leading to boredom. 2. **Advertisements are intrusive**: Users complain about frequent and unskippable ads that disrupt gameplay. 3. **No undo feature**: Users are frustrated with the lack of an undo feature, making mistakes difficult to correct. **Pros:** 1. **Addictive puzzle gameplay**: Users praise the engaging and challenging puzzle-solving experience. 2. **Variety of level types**: The app offers different level types, such as time-limited and infinite levels, keeping gameplay fresh. 3. **Simple and intuitive interface**: Users appreciate the easy-to-use interface, making it accessible to players of all ages.