I just purchased a new set of leather skins for my CS 350Z from the guys at http://www.leatherseats.com and I must say, the craftsmanship is awesome, the install was easy and it looks soooooo much better. Here are some pics: http://www.alberdings.com/chriss_stuff.htm

If you are thinking about upgrading from cloth or are replacing worn leather, these guys are very reasonalby priced and I could not have been happier with the quality, look and feel.