I have them on mine with DS2500 pads.
They were fitted by the previous owner but had only done about 2k miles when I bought it. Can't tell you how much better they are than standard as I never drover it standard.
All I can say is that they are miles better than the 312mm brakes on my previous LC and are more than up to the job of coping with my IHI turbo on the road. Have yet to go on track with it so can't comment on that but can't fault them on the road. They seem to have the opposite of fade and just get better the more you use them and are still good cold
I did read somewhere that Badger5 does some larger 2-piece ones for similar money - 330mm with adapters for the calipers and he reckons they're better than the AP's which he has had warp on the track.