Based on the users' reviews of the Fill Up 3D app, here are three pros and cons: **Pros:** 1. Easy to use with intuitive interface: Many users praised the app's user-friendly design, making it simple to navigate and play. 2. Variety of puzzles and levels: The app offers a range of puzzles and levels, providing a good level of challenge and replay value. 3. Great for kids and adults alike: Users appreciated the app's appeal to both children and adults, making it a great family activity. **Cons:** 1. Some puzzles are too easy or too hard: A few users found the puzzles to be either too simplistic or too challenging, making it frustrating to progress. 2. Limited game modes and features: Some users felt the app lacked features and game modes, making it feel lacking in depth and variety. 3. Ads can be annoying: Several users complained about the ads being intrusive and annoying, disrupting their gameplay experience.