Recently had my G56 exhaust installed as well. Phenomenally happy with it. For what it's worth I was REALLY hesitant to get them because I thought the heat shields looked really cheap in photos but seeing them in person they look really nice.
I wish that they could have been made to work with the OEM brackets just because of how involved the install is for something that should bolt on, but it's a once in a lifetime thing so oh well.
I have a track day coming up in a week and I can't wait to see how this thing handles out there now.