I had a U shaped quartz counter installed. The seams were terrible. One was unlevel and the installer just filled it to level it. Unfortunately I wasn't present during the install. The 2nd seam seperated about 4 months later. I've had no luck trying to have them repair it. They don't return phone calls and I've had to attend the store to speak to someone. They dont keep appointments when they're supposed to inspect the problem. Their original explanation is that the product is natural and this type of imperfection is normal. Nothing could be done to fix the problem. When I told them that Quartz is man made and it would have been ground and polished level at the factory, they advised they would have someone grind the counter top to level it. I was told that this would change the colouring slightly where it is ground and refilled. They would not give a straight answer as to what they would do if they made the counter look worse. When I told them that if someone working for me did this type of work, they'd be fired. I was told the installer had been let go. To me this is an admission that the product was installed improperly but I still can't get a satisfactory resolution. I'll have to use small claims court. The cost was quite reasonable. I got the name from a referral. I've seen the other work and it was excellent. Take your chances. if its done right it's good. If its done wrong, good luck getting it fixed.