why is hearing the brakes whistle is a good thing ? In sports/tuned cars

Question

Example : youtube video by Misha Charoudin
Title : F1 Driver Robert Kubica in BMW M4 on Nurburgring
Minute 1:45 , he says << good brakes after hearing them whistl,>>

How is it they’re good ? I always thought its a bad thing

In: Other

Answer 1

Is he saying they’re good *because they whistle* or *because they worked very effectively*?