Quality of Materials: Consider the materials used in both the table and the chairs. Are they durable? Do they feel sturdy? Since this set is advertised as "cottage" style, you might expect a rustic feel, but you'll still want the materials to be of good quality.
Design Aesthetic: Does the whitewash finish match your decor preferences? How does it fit within the overall style of your dining room? Assess if the design appeals to you and complements your existing furniture.