I've installed them in my VW Bug...but it's a show car, so when on display, the shiny stuff gets points.
I've not noticed any better braking performance, but on a Bug, we're not talking Bremo brakes here!
Stick to OEM unless you are doing a racing brake upgrade that warrants high performance stainless steel brake lines.
2009 ML350 (84K) - Family vehicle
2001 CLK430 Cabriolet (71K) - Wife's car
2005 BMW 645CI (124K) - My daily driver
2012 Mustang V6 (60K) - Daughter's car