Based on the user reviews, here are three pros and three cons of the Merge Ball 3D app, each summarized in 15 words or less: **Pros:** 1. Engaging gameplay: Users praise the game's addictive and challenging levels that keep them coming back. 2. Addictive merge mechanics: Many appreciate the satisfying experience of merging balls and seeing their progress. 3. Simple yet enjoyable graphics: Users find the 3D graphics easy on the eyes and pleasing, enhancing their overall experience. **Cons:** 1. Frequent ads: Many users express frustration with the excessive ads that interrupt their gameplay and slow down loading. 2. Limited power-ups: Some users feel that the power-ups are not adequately equipped to help them overcome challenging levels. 3. No free hints: Complaints arise from the lack of free hints or assistance, leading to frustration and potential game abandonment. Please note that these summaries are based on a subjective analysis of the user reviews available on the App Store at the time of writing.