I just install the powerflex bushing and it is amazing.
Shifting is so much smother,it just slides right into gear.
It was a bit of a pain to get the bushing in,but anyone can do it.
I recommend this for anyone with notchy like shifting.
Also makes the quatermaster clutch easier to daily drive.
I don't feel any more vibration than before the install.

 

what if your motor mount still looks perfect? does it still help to install this or is it just a waste of money ...i don't want excessive vibrations

 

FWIW, I noticed more vibration when I installed mine and no difference in shift quality, but the car had only about 10K miles when I did it.

 

just got mine in the mail, will write up on it once its installed.