I think their normal discount is only 10% so 15% is definitely a bonus! You're going to love them. I LOVE mine. I paid $764 for mine and sold my oem seats for about 550 or so so it was a nice upgrade.
FYI if you don't want to buy Braum harnesses (they're not cheap) I got some nice Impact Racing harnesses and they're SFI 15.6 rated.