Well, I couldn't resist
0-100 km/h test with Ventura tuning box for the B48 engine in a BMW G30 530i
Original 6.33 sec
Ventura tune 5.23 sec
Speedo goes from 98 to 103 in 16 frames (in video editor). Counter is stopped after 10 frames which should equal just over 100 on speedo.
Video embeded below (vimeo.com/284530588 in case you can't see it here).
I'll be posting a review shortly.