Trying to achieve a comfortable ride

[Erratic67]

I have installed my disc conversion and in the process of running the brake lines to have a completed job. A duel master cylinder and proportioning valve will also need installing as well. I did not receive a booster in the conversion kit but am curious if I should get one, ECE has instructed me that it is really not needed.

Can someone elaborate as to if there is a noticeable difference with or without to avoid unneeded extra expense or rework?