Wow! Although I am annoyed, after reading that I am almost grateful! It's too bad you aren't over here in Wisconsin...you seem to really care and understand that people put a lot of time and money into fixing up their little piece of paradise, so quality matters. I am just kind of annoyed because my countertops don't seem to be that hard of a job....14.5 linear feet between two walls with a sink and faucet cutout. Not too much to go wrong. I feel like the boys knew they did something because I heard them have an "Oh sh*t" moment. I wasn't in the kitchen, as I was with my one year old, so I don't know, and at the time I just didn't really think much of it. Hopefully it can get rectified!

@Josheph Corlett: the last picture of the initial post was actually showing the quartz in my ensuite bathroom. They were installing quartz on the shower curb threshold and also on a ledge in the shower. The miter pictured is where the two pieces of the shower curve meet. I had asked them to make the L-shape for the shower threshold out of a single piece but they said it needed to be two pieces so that they could both be angled in toward the shower to prevent water from pooling. Here are two additional photos of the shower and threshold for reference: As for the kitchen counter, they used only two sections for the back counter: one large L-shaped piece that is 104 3/8" x 46" that ends at the right-edge of the cooktop, and then a U-shaped piece that is 52" long and wraps in front and behind the cooktop. So the only seam in the kitchen is the one at the right side of the cooktop. I'm going to head to the house today to check the level and plane and will report back. Thanks again for your continued advice.

Sorry, Melissa, I can't make any sense out of what you're describing. Perhaps you could draw something, take a picture of the drawing and post it? The more rounded the edge, the less likely the chipping.

HU: HD contracts with different fabricators all across the country. They like to award all the work in a particular state to a single fabricator.