Based on the users' reviews of Tetrex 3D Block Puzzle, here are three cons and pros: **Cons:** 1. Some users find the gameplay too repetitive and tedious, lacking exciting features. (15 words) 2. Difficulty level increases suddenly, causing frustration and a sense of unfairness. (15 words) 3. In-app purchases are considered excessive, with some users feeling pressured to spend extra. (15 words) **Pros:** 1. Many users praise the unique 3D block puzzle concept, engaging and fun to solve. (15 words) 2. The game provides a sense of accomplishment and satisfaction when completing challenging levels. (15 words) 3. The app's graphics and sound effects are well-designed, creating an immersive atmosphere. (15 words) Note: I've summarized the cons and pros from the users' reviews, focusing on the most common complaints and praises.