hi corrie, similar to others posted (from houzz): [eclectic kitchen design[(https://www.houzz.com/photos/eclectic-kitchen-ideas-phbr1-bp~t_709~s_2104) by new york interior designer Olga Adler [traditional kitchen design[(https://www.houzz.com/photos/traditional-kitchen-ideas-phbr1-bp~t_709~s_2107) by philadelphia general contractor Echelon Custom Homes [traditional kitchen design[(https://www.houzz.com/photos/traditional-kitchen-ideas-phbr1-bp~t_709~s_2107) by boston general contractor Mitchell Construction Group

Nic's,,the 4" piece should come off easy enough. you may tear the paper on the backsplash, which is ok if it's not too deep into the drywall. I guess if you were on scene you could have asked them not to install it. I mean, what difference is it to them whether or not it goes on the wall? to say it would be more money not to have one, is ridiculous. it takes more time to cut one and finish the edges! but, whatever. as for the design, it's a herringbone. and those I've shown you come on 12" sheets so you don't have to do the actual design (which is very difficult) the first one is calacatta marble in a 1x2 herringbone (also comes in a 1x4, which I like better). You can find this all over,,,even Houzz carries it. If you want the marble, then stick w/the Calacatta not the Carrara. carrara is a blue/white and will clash w/your counters. calacatta has a warmer tone to the stone. the 2nd on is a tumbled travertine which you can get here: https://www.pebbletileshop.com/products/Cream-Herringbone-Stone-Mosaic-Tile.html#.WhX_BLaZNT4 this will give you an idea of what it looks like installed (you can turn it longways as well) If you search "herringbone mosaic tile" you should get lots of ideas and places to buy them. this one is from Lowes, allen and roth. you could buy one and bring it home to see how it looks this is the basketweave this would also work. crackle glass by Merola tile. Olean Glass mosaic. I think Home Depot carries thesenothing wrong w/doing a little color. pale green, blue or gray would also work well. https://www.homedepot.com/p/Merola-Tile-Chester-Sage-3-in-x-12-in-Ceramic-Wall-Tile-1-sq-ft-pack-WNU32CSG/300341310 these would also look nice,,,they have them in different shades https://www.mercurymosaics.com/shapes/field-subway-tile/

I have done the exact same quartz wrapped hood as you have and my kitchen person also built a box like yours out of plywood. Have you had any issues? Do you have pictures of how the plywood box was contructed on the inside? I am so worried that my quartz will fall and kill us all!!

Discuss your disappointment with the repair, and ask if a do-over of the repair is possible where the result will not look even worse. You should absolutely negotiate a discount.