We ordered 2 Channing 27" Wing back Chairs.  You have to insert the back portion into the sitting portion.  One of the chairs fit perfectly but the other had a gap on one side and did not look good.  I emailed Wayfair and explained the problem along with a photo of the chair.  They immediately sent me a reply that they would send another chair and we could keep or donate the other chair.  We just received the other chair and it fits perfectly.  We are so relieved that we did not have to re pack the defective chair and send it back along with paying for the shipping costs.  This is going way above great customer service.  Thank you Wayfair!!!