Brake discs Bosch or GiroDisc

I recently went with Bosch branded discs and pads for an E46 330i M Sport. So far, so good.

Reliability and safety are my main concerns right now, so I also have Girodisc rotors

Bosch quiet cast rotors and akebono pads. Pros not alot of dust so wheels are pretty clean. Cons none so far.

Hey, 2 weeks ago I bought Bosch QuietCast rotors from jeffrey bezos...FRONTS pair were $120 ($60 each) and rears pair was $60 ($30 each). Also bought Bosch brake pads from Tirerack for $45 fronts and $29 rears.

I got rear Bosch rear discs for my DS3 (with bearings and ABS rings) for £39 each delivered best deal I could get at ECP was £91 each best part was they were delivered by ECP

Almost every car in our PCA club runs GiroDiscs, even the GT and RS cars. Never heard a single complaint, and love them on my C2 and GT3.

We are on our fifth weekend with our girodisc two piece rotors. Yes they are expensive, but they are worth it. They are so much better with heat management.

Follow up after my track day: The Girodiscs + Pagids were amazing. Tons of bite, and zero fade, plus plenty of pedal feel after two days of running hard at VIR.

I have had great success with Girodisc rotors this summer. I have been using Ferodo DS2500 pads for a few years and love them, but rotor temperatures would hit 800+ degrees after track sessions and conventional rotors, like Stop Tech, developed surface cracking and maybe a bit of warp. Girodisc rotor temps have been around 550 degrees after sessions this summer.

Update for all those following along. My brakes were the best they've ever been today - on a very, very hot day (feels-like temp over 100). I had a vibration with light brake pressure, but pressed on giving more pressure and found that as the brakes got more heat in them, and I went deeper into the braking zone, the vibration disappeared. All was well, but after checking the rotors, they appear to have developed cracks.