Based on the users' reviews, here are three cons and three pros of the Zombie Waves 2 app: Cons: * "Lack of originality in gameplay, feels like a clone of other tower defense games." (14 words) * "Too many ads, becomes frustrating to play after a few levels." (14 words) * "Difficulty spikes too quickly, becoming unrealistic and frustrating to progress." (15 words) Pros: * "Engaging and challenging, keeps me coming back for more tower defense fun." (14 words) * "Variety of towers and upgrades keeps the gameplay exciting and refreshing." (14 words) * "Well-designed levels, visually appealing with good sound effects and music." (15 words) Please note that the reviews on the Play Store are subject to change, and this output is based on my analysis of the reviews at the time of my knowledge cutoff.