Based on the users' reviews, here are three cons and three pros of the "Guess the Riddle - Riddle Quiz" app: **Cons:** 1. "Not challenging enough for experienced puzzle solvers, easy riddles are too straightforward." 2. "Too many ads, interruptions make it difficult to focus on the riddles." 3. "Limited riddle categories, repetitive content gets boring quickly." **Pros:** 1. "Great way to exercise your brain, fun and engaging for all ages." 2. "Beautifully designed, intuitive interface makes it easy to navigate." 3. "Constantly updated with new riddles, keeping it fresh and exciting."