Based on the users' reviews of the app "Spot the Difference 10: What's the Difference?", I've extracted the following conclusion: **Pros:** 1. Engaging gameplay: Users enjoy the challenge of finding differences between images. 2. Variety of levels: Reviews praise the app's diverse levels and increasing difficulty. 3. Ad-free experience: Most users appreciate the lack of ads in the app. **Cons:** 1. Limited replay value: Some users find the app too short, with too few levels to keep them engaged. 2. Graphics not high-quality: A few reviewers comment on the app's basic graphics, feeling they're not up to par. 3. No leaderboards or competitive aspect: Users miss the social comparison aspect, found in other apps. Please note that these points are based on a curated selection of user reviews, and opinions may vary.