This was one of the first mods I did to improve the brakes on my Legacy. It made a noticeable difference to the feel on the brake pedal, however, it didn't make any difference to the braking ability. The braided lines again made a small difference to the feel of the brakes. But the biggest difference was when I changed the brake servo and master cylinder. I bought these from a Hawkeye Impreza STI. This almost completely removed the spongy feel on the pedal and really increases confidence in the braking ability.