Based on the users' reviews of the TennisGroups app, here are three cons and pros: **Cons:** 1. "Disappointing experience with bugs and glitches, often crashes and loses data." (15 words) 2. "Too many annoying ads and notifications, disrupts the overall experience." (15 words) 3. "Limited features and functionality, not user-friendly for new users." (15 words) **Pros:** 1. "Easy to use and navigate, great for organizing and managing tennis matches." (15 words) 2. "Very helpful for finding tennis partners and courts, even for beginners." (15 words) 3. "Good platform for connecting with other tennis enthusiasts, lots of matches available." (15 words) Please note that these are just summaries based on the user reviews, and might not reflect the complete experience of the app.