Typically you do notice that the lines help a bit. Dean will tell you that it's because you put in fresh fluid at the same time, but don't listen to him.
I noticed that it made it so that the brakes started doing something higher in the pedal stroke and the pedal position had a linear effect on braking. Like before, all the braking was done with various pressure at the bottom of the pedal stroke, but after, the brakes started biting as soon as I got into the first inch of stroke and bit more progressively as I moved my foot toward the floor. Much easier to modulate and more responsive. Guess it could have been the fresh fluid too though.