Based on the user reviews on the Apple Store, here are three cons and pros of the "Slider Puzzles 2017" app: **Cons:** 1. "Too many ads, disturbing the gaming experience, and feeling trapped." (15 words) 2. "Some puzzles are too easy, lack challenge and motivation to continue." (15 words) 3. "No option to skip levels, forced to watch ads or restart from beginning." (15 words) **Pros:** 1. "Engaging and addictive, perfect for casual puzzle solvers and experts alike." (15 words) 2. "Various puzzle types and levels, keeps the game fresh and exciting." (15 words) 3. "Simple yet elegant design, easy to use and navigate, no clutter." (15 words) Note: The reviews are based on the available user reviews on the Apple Store, and the output is subjective based on the analysis of the reviews.