1. Room Dimensions and Suitability: Pay attention to the dimensions of your room and check whether your sofa set is suitable for this space. It should match the overall design of both your living room and lounge furniture.

2. Comfort: It is important that your sofa set is comfortable. It should feel comfortable when you sit and not cause problems such as back pain when sitting for long periods of time.

3. Material and Durability: Pay attention to the material quality for the lifespan and durability of your sofa set. Choosing a quality fabric or leather means a long-lasting and durable sofa set.

4. Style and Design: It is important to choose a sofa set that suits the general decoration style of your home. You can choose from a modern, classic, rustic or minimalist design.

5. Color Matching: Color selection should be compatible with your home decoration. It is important to choose a color palette that will harmonize with wall colours, carpets and other furniture.

6. Functionality: If you need multi-purpose use, you can consider sofa sets that include functions such as storage areas or a bed.

7. Ease of Cleaning: Your sofa set should be easy to clean. Fabrics or leather materials with stain resistance properties may be preferred.

8. Budget: It is important to choose a quality sofa set without exceeding the budget you have set. Consider the price-quality balance.

9. Brand and Review: Choosing reliable brands and reading previous customer reviews can help you in choosing a sofa set.

10. Warranty and Service: Pay attention to the warranty period and after-sales service opportunities of the sofa set you purchase. If you are going to make a long-term investment, these details are important.