I just overhauled a toilet tank with new innards, and am now replacing the supply line since I've got a leak where the supply line connects with the bottom of the fill valve. I bought a stainless steel-braided flexible supply line from Fluidmaster. I have to say that these things sure make life simpler for the DIY'er since every time I've bent a solid supply line, I've either kinked it or had trouble getting the bends just right so everything lines up hunky-dory.

On the other hand, the flexible lines don't look quite as nice as a chrome rigid line.

How well do these flexible lines hold up? Is there a replacement interval? Is there any difference between the stainless-steel-braided ones and the plain white plastic, or the thin gray, ones?

Thanks for your opinions and experience in advance.
Steve