Based on the user reviews, here are three cons and three pros with a 15-word limit each: **Cons:** 1. "Randomness is not ideal for focused learning, often gets stuck on easy cards." 2. "Limited customization options for topics and difficulty levels, feels restrictive." 3. "Occasional glitches and bugs, freezes sometimes, and data loss issues." **Pros:** 1. "Comprehensive library of math problems, covers a wide range of topics and levels." 2. "Intuitive interface and user-friendly design, easy to navigate and understand." 3. "Timed practice mode and rewards system motivate me to learn and improve consistently."