Skip Barber, too -- but I was driving that way long before I took his courses.
I'll do heel-and-toe downshifts on a closed course but I don't drive that way on a daily basis on the street and if I expect a transmission to last me 100k plus miles.
My wife used to do the "downshift" thing for toll plazas on the Parkway and it irked me no end.
She rarely managed to match the revs with the speed and the car did not sound/feel "happy" when she did it. The end result was that I "volunteer" to do all the driving when it involves one of my cars.
Maybe that was her intention.
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2008 E91 36K, 6-speed, RWD, Alpine, Terra, Xenons, ZSP, ZCW, ZPP, PDC, CA, alarm, M shifter and M brake handle, Euro rear fog light switch, Euro aspheric mirrors, rear power outlets, Euro split armrest, Lidatek, remote V-1, Cocomats, beach sand, $10 clutch stop mod. 1998 Volvo V70T5 226K, 5-speed, original clutch (third clutch pedal!), aspheric driver's mirror, E-code headlights, IPD sway bar, strut tower brace & skidplate.