I am sure your Z is not a daily driver, if it is the Corbeau A4s will wear you out on a long trip as the padding is minimal and really they are light weight racing seats. If you are bombing around town, heading to the track, car show or sunday drive, great seats, even if you are taking the wife girlfriend to dinner and a movie on an evening out, they rock, but daily use not so good. It also depends on how stiff your car's suspension is too <- this is big.
I have had A4s on three different cars, currently I have a set in my daily driver Turbo Mazda 323 and also in my seldom driven 280ZX Turbo. The seats are starting to come apart on the bolster stitching on my daily driver and they have not lasted as well as I thought as they would, I bought these seats two and half years ago (all bought brand new) and they have about 15,000miles on them. I am disappointed to be honest as they are starting to age, faster that I would like, again this is on my daily driver. I am 6.0ft tall and weight 160ish lbs, so I am not really brushing up hard on the bolsters during ingress and egress.
The A4s in my 280ZX Turbo look fantastic, as they should, they are about 4years old and have only about 1,000 miles of seat time in those 4years.
I have the standard cloth fabric and they are very tricky to keep clean, especially if you have a pet or dust strands get in there. Using a lint brush or tape does not work, good ole fashioned by hand.
I called Corbeau and they only offer a 1year warranty on their seats, so thats is unfortunate but probably standard for this type of product.
I will be interested to hear your feedback on that new miscrosuede (I did not even realize that is a new fabric option from Corbeau) and how it wears in time. I am not sure how much you drive your car per year.
I was going to post some pics, but do not want to hijack your thread.
Looks great and compliments the car for sure! As a reference on my S30, I will be installing Mitsubishi Eclipse seats.
My best - Yasin