Hi I used ACC, ordered from CJ Pony. Ordered carpet color (parchment) by year from their website but was incorrect when I received it. I ordered parchment and received saddle. Sent it back and then received parchment but it wasn't exactly the same color my mustang had originally. Very close in color and no one will know but me.
My opinion if you are using sound deadener ( foam/vinyl type) don't get the carpet that comes with padding, it will be too thick to lay down well. Have on hand several sharp razor blades (5 pack $2-$3 harbor freight) and a heat gun ($25.00 harbor freight). A hair dryer will not suffice. Spray adhesive or Velcro to make it stay in places like up against the firewall. Don't cut holes until it is in place for bolts 'n shit.
ACC is a good looking carpet, maybe better than OEM. Pre-formed but still requires a lot of work to get it right.
Hope that helps