The only possible concern as far as I can see is that of the pipe expanding when you use it, thats the only way it would affect your pedal feel, your passing brake fluid at high pressure, if that pressure is kept in and the pipe doesnt expand then it cant be any different. I cant think of one good reason to run solid lines, when you make them yourself they look shit 9 times out of 10 and nothing like the original. With braided you run it where you want and it looks like a hell of a neater job. For the record I didnt feel any difference whatsoever when I ran full lines on my car, but it sure saved me a lot of time and pissing about that trying to bend solids would have done.