Funnily enough I was watching a doco on tellie 2 nights ago and saw a Nam pilot in a huey showing off to a camera as he hooked into a very very low level, 60 degree+, 4G (you get the idea...)turn to pickup a wounded GI. He was so low and so aggressive that I knew the flare would be interesting.
Well a whole lot of dust and dirt went flying as he dug the tail in, but it was most effective in slowing the huey enough to land before running into the camera. I commented to my cojoe that what was needed was a sideways quickstop arrest his inertia and clear his tail.
I was trained to do them and often practice them but have only used the method during a little bit of mustering. Mustering and venison recovery pilots seem to fly more aggresively and thus are exponents/masters of the technique.
I found on the B47 that it didn't really appreciate a RH quickstop and you had to be careful not to stall the TR.
Other than that, its an effective technique to slow in a hurry and save your tail as long as the engine keeps running. An engine failure traversing sideways tends to be a negative experience.