Based on the users' reviews of the Core Combo app, here are three cons and pros: **Cons:** 1. "Disappointing experience. Ads are invasive and often crash the app." (15 words) 2. "Limited functionality and not user-friendly. Frustrating to navigate through workouts." (15 words) 3. "Not customizable enough. Can't adjust intensity or modify exercises to suit individual needs." (15 words) **Pros:** 1. "Excellent workout variety and intensity levels. Keeps me engaged and challenged." (15 words) 2. "Well-designed interface and clear instructions. Easy to follow along and track progress." (15 words) 3. "Convenient to use anytime, anywhere. Perfect for busy schedules and travel." (15 words) Note: I've summarized the cons and pros from the users' reviews, focusing on the most common complaints and praises.