Well, it is not the end all fix....it takes a decent shot and makes it a little better....it won't correct a bad shot as it has to zoom in too much.....
I tend to slightly stabilize every clip....but not overly stabilize it. .5 to .7 works for me.
Now in fairness, I have become occasionally decent in holding sort of still on macro, so I just shoot enough footage so sooner or later I will get something usable.