Based on the users' reviews, here are three pros and three cons of the Hop Runner app, each in 15 words or less: Pros: 1. "Love the variety of workouts and the ability to customize my routine." 2. "Great app for beginners, easy to follow and fun to use." 3. "Excellent music selection and energizing beats keep me motivated." Cons: 1. "Some exercises are unclear or difficult to replicate without proper guidance." 2. "Limited space for user feedback and suggestions for improvement." 3. "App crashes occasionally, frustrating but not a consistent issue."