I've done a similar day & it's like others have said, after driving the supercars on the track your's will probably feel slow/bad. Of course I haven't driven the Z4M though so who knows. I did a Ferrari & Audi R8. They both were amazing aside from the mentor not letting me brake hard. I was forced to put the brakes super early. I could of out braked in my Z4 with stock pads. Anyways, still a blast & car still felt slow/sluggish after the drive.