I've had Akebono ceramics on the front for over a year. Just installed them on the rear wheels as I was tired of driving around w/ dirty rear rims. The bite isn't as good as OEM, but the huge reduction in dust is worth the trade off for me.

No noise to date.

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2010 X5 3.5d: SOLD, but miss the torque...
2004 X5 4.4i: SOLD, but served us well