Based on the reviews of the Big Stack app, here are three cons and three pros, each within the 15-word limit: Cons: 1. "Constant crashes and freezing issues make it frustrating to use the app consistently." 2. "Poor customer support and no response to my refund requests was disappointing." 3. "Limited features and functionality compared to other apps in the same category." Pros: 1. "Easy to use interface and intuitive design make it accessible to new users quickly." 2. "Robust features and customization options allow for a personalized experience." 3. "Community support and forums provide valuable resources and helpful advice from users." Please note that these are general summaries based on a sample of reviews and may not represent the opinions of all users.