I ordered a twin mattress pad for son going to college. A queen was delivered.  I called customer service and the twin was reordered for shipment immediately so that it would arrive prior to my son leaving for college. I received the pad in time so was happy.  This was my first Wayfair purchase but since customer service fixed the problem, I was satisfied. I'm sure my college son is happy too not having to sleep directly on a college dorm mattress. 

Pros: Customer service quickly fixed the shipment problem.
Cons: Wrong size originally delivered.