For me... the only time I was able to use it extensively consiously.. (Unless I am doing it unconsiously.. which IS possible..) Was autocrossing my Old ITA RX-3....

Notice the word OLD. The thing handled like a covered wagon.. Was QUICK.. but handling was.. well a hand full. On autocrosses a light application of brakes was real nice to settle the suspension to get things reined in in corners.. it had a tendency to do all the things you dont want.. body roll, dive/rise of the nose.. and squirming all over the place from the leaf spring rearend.
I STARTED autocrossing a Oldsmobile Firenza Wagon in High school.. and as it was a automatic.. I would double foot that thing to settle things in fast corners.. (Yes I won plenty of HS and DSP autoXs with it.)

On the roadrace side of things.. I never left footed the RX-3... it was WAYYYY too skittish to try. It was a true handful near the limit.. and as it was it was a constant battle to keep it going the direction you wanted... cause the frontend wasnt always pointing that direction. The dogleg at Daytona was a place where theoretically it would have been a good idea looking back.. but again... that was flat out at 7K in 4th gear.. and it was floating across the track... wallowing left to right.. frontend pointed correctly but body roll was actually terrifying... as it was oscillating back and forth.

On the 1st gen and 2nd gens.. havent done it as of yet. They actually handle pretty well... at this point.

 

This is a old video with a couple runs.....The second part I use a slight left brake in the fast turn to the left but stay on throttle.1993.This is a large file ..cable connection save target as takes 3 minutes. I cant edit the end so...when you see the blue overheated RX7 you can stop it...the music reloads sorry.
My real good in car video is in storage. 11 years of some nice stuff.
REMEMBER LARGE!
ftp://rxclub:rx7clubpiidb@66.253.174.19/rx7/l8tclub
or this link my work
FTP://rxclub:rx7clubpiidb@66.253.174.19
as ....... l8tclub