Reviews of STOPTECH brake discs

I did the OE sized StopTech setup on my car in July. I really like them. I don't have a lot of time on them, but I'm happy with them so far.

At ~4,000 miles, I bought a set of StopTech (front) drilled+slotted rotors (non-PP) for my GTI and kept my OEM brake pads. Everything was fine up until recently (~2,000 miles later). I now hear a high pitch "squealing" noise at very low speeds. This happens right when I'm about to come to a complete stop (1-3 mph).

End result: Threw in the towel, went with OEM-sized slotted StopTech rotors, and I'm done.

I have StopTech drilled/slotted. Ive ran mine for about a year now, purchased through Rock Auto. Very happy so far with the quality and performance. Take a while to warm up but then they hook just fine & work great with my Hawk Ceramic pads for minimal brake dust. They have held up just as expected, no signs of rust ect. I do not daily the R, so these do not get daily abuse.

Stop Tech drilled /slotted front rotors , Power Stop evolution carbon fiber/ceramic brake pads ..Raybestos solid rear rotors with Stop Tech ceramic pads (painted calipers n rotor hubs blue)

We run a Stoptech BBK on the BMW 335 car that I race in endurance races (4, 9 or 12 hour) and we run either slotted or plain rotors, but never run cross-drilled. Our rotors last longer and we don't have the cracking issues associated with cross-drilled.

I have drilled and slotted rotors on my MK7. I have never had any warping or cracking issues with them, or one any other car that I've ever had with them. Performance wise I've never noticed a difference between stock or drilled/slotted rotors except for in wet conditions. When it's wet out break feel is MUCH better with drilled/slotted rotors.

+1 for stoptech st-40s, they're slotted 328mm rotors and 4 pot calipers. Car brakes really nice. Kept the stock rears, although had to replace calipers at about 120k as they were starting to seize. If the car sits for a few days, the rust builds up (I assume in the slots) and makes noise . Goes away after about 30-40 miles. Not sure if drilled would be better. I definitely don't regret it, but modulation from the 4-pot isn't improved the way I thought it'd be. For the same price or just a tad more I could've gone with R32/GolfR/etc. front and rear, I'd probably do that if I were to do it again.

That is not true. I have been running the StopTech BBK with 355x32 floating rotors (Z4M Coupe, 3275lbs + me) for over 2 years with 25+ track days on them and they have not warped.

Brakes: (front) StopTech 13.5” slotted Frodo, 944 Porsche pads, (rear) VR6 disc from 1996 Golf