Based on the users' reviews, here are three cons and three pros of the Harbor King app: **Cons:** 1. "Too many ads and in-app purchases, distracting and annoying gameplay experience." 2. "Crashes frequently, especially after longer gaming sessions, frustrating and hard to restart." 3. "Less challenging levels and monotony sets in, needs more variety and difficulty options." **Pros:** 1. "Addictive gameplay, engaging storyline, and relaxing music create a soothing atmosphere." 2. "Simple yet challenging puzzles require strategic thinking, satisfying to solve levels." 3. "Lovely graphics and animations bring a sense of serenity, visually stunning experience." Please note that these are based on the reviews I read, and might not represent the opinions of all users.