Just wanted to post an update to this.
There were some issues regarding my seat covers which I posted photos of here. Cars suspected there could be issues from poor installation. Cars wanted the covers back to examine so I had the problem covers removed at a second upholsterer's shop. They examined the covers and made me a new set of front seat backs (the ones with the issues). They were redone at no charge regardless of who was at fault. My second upholsterer finished installing them this week and I picked them up Sunday. They look amazing. MUCH better. Seams are nice and straight, covers fit well and welting (cord) looks like it should.
Thank you to Cars for working on making this right and many thanks to the second installer that did a fantastic job on the installation. John at Perfection Auto Trim in Milwaukee, Wis. I'm out a couple hundred extra dollars from the first installer but at least everything turned out great!