The morph brush DOES have problems, though. 

Yesterday I played with it the entire day. One thing I discovered is if you saved and close the file, i.e. PZ3, and then reopen there is no saved information. So if you wish to finish with the same morph, the tool will: First, go crazy when trying to apply, and then P7 with vanish.

I was using M3 for my experimentation, btw.

I finally got the hang of push/pull/smooth. And all was well until I stopped, saved, closed P7 and came back. No matter what I did, be it spawn the morph target, save copy as a different name or leave it as an open custom morph, each instance I returned to it, it wouldn't allow me to work on a morph-brushed figure/body part. It would distort the mesh, then P7 would POP/Vanish away.

While a great tool, it has some problems, I think.

-- Jeff