Firstly, let me say, we are not sponsored, just really happy customers.We were hesitant to get a couch with only 72 reviews until we got the boxes and started putting the couch together.We got the brown color which is a really pretty soft chocolate milk color, it looks gray in warm lighting and matches our interior really well (probably even better than the gray would have!)The couch feels so luxurious, starts firm and then breaks in, has storage space, and feels as good as it looks. We've spilled drinks and sauce on the couch and the clean up was so easy, we only needed to wipe down the spill with paper towels, and bonus, NO STAINS! We also have a cat and his little claws don't make any marks, even when he kneads the fabric or climbs on the backrests like they are trees.The sellers are very responsive and communicate easily and quickly. We had an issue with one backrest, which the sellers quickly resolved and replaced for us.If I were buying the couch again, I'd want to have some questions answered, so I'll list and answer the questions I had in hopes of helping anyone else in the future:How do the backrests work?There are no weird sounds like one review mentioned. They're way more substantial than they look in the company's pictures. They also gently lock into place at multiple angles so that the couch looks uniform. We put throw pillows on the couch in addition to the lumbar pillows provided for when we lay down, but when you're sitting upright there is no need for any other pillow. It has the great back support of an executive office chair which is so unusual for a couch.What is the dimension of the corner piece in the front?21 inches acrossHow does it feel?At first it is firm, but it breaks in really well. We've had it for a few weeks now and it is about medium firm yet supple. We had another soft cloud type couch and the cushions went flat after 2 years so we were looking for a couch that would hold shape. The seat cushions are so deep and support a full adult group of 6 sitting together.Armrests?The back pieces are interchangeable and can fit on any of the sides so they function as arm rests. We used some of the smaller ones from Carton D (corner backs) as our arm rests since we have it set up with one corner piece as an ottoman.Overall, we are so happy with our purchase and we recommend it to anyone looking for a beautiful, elegant, comfy couch!