I just finished building a bumped out TV and Fireplace wall in our living room. I fnished the wall with your wide plank walnut wall slats. As you can see by the picture, the end result was fantastic.
The product was easy to work with and cut like a dream. My only suggestion would be to add a corner piece to the product selection. I had to use two end pieces to butt join the side walls. A dedicated corner piece would've made life a bit easier. Anyway, Andor Willow provided a fantastic product.