Braided lines always made the brake modulation feel so much nicer on the many motorbikes I fitted them too. I guess it's a personal preference thing but I much preferred the feel. I'd expect the same in a car. Braided lines will expand very little / if at all compared to standard rubber lines. Have to be careful when choosing brake fluid too. Some Dot 4 fluids have higher boiling points than some DOT 5.1s for example. Pays to do a bit of research on that before purchasing.