Track smoother uses a multiplier effect meaning:
If your track is good, itll get better.
If your track is bad, itll get worse.
It does what YOU cannot. According to one of Busters original posts it will move the handles and verticies around in much much smaller incriments that you can possibly move it. It also fine tunes parts so tiny that again, youd never be able to do it.
It isnt a wonder tool. Your track has to be good-great for it to be useful. Otherwise, its not what everyone thinks it is. If you use it, its STILL your work, its just taken out some tiny things you most likly couldnt ever fix.