Group 1 - The article emphasizes the importance of making informed decisions when purchasing a home, as it is often a lifelong commitment involving significant financial investment [1] - It introduces three practical principles for selecting a property: buy edge units, buy east-facing units, and avoid the third floor [3] Group 2 - Buying edge units is recommended due to their advantages such as reduced noise from neighbors and better ventilation, despite common perceptions that they are less desirable [5][6] - East-facing units are highlighted for their favorable sunlight exposure, providing a comfortable living environment, especially in colder regions [8][10] - The article advises against purchasing units on the third floor due to potential inconveniences such as lack of elevator access and drainage issues, suggesting higher floors as better alternatives [12][14]