My Decoy Core 4 came with Dominion A4 brakes. On the first ride I overheated them and warped the rotor. (Crazy steep fast hill). I changed to the semi-metallic pads. They run cooler but glaze and then are loud when you use them until the pads heat up. Power and modulation are great.
The pads are good, and they come with a new retention bolt, which I needed. But, strangely, they didn't come with a new spring, which I also needed, so that was disappointing.
I really like the sintered pads. Great modulation and power but not as touchy as the semi metallic pads. They can be a little noisy but not as bad as other brakes I have run in the past (cough....Codes....Cough). They last quite a while too. I got 15 days in the bike park and lots of riding on my home trails one a single set this summer. They don't stink when they get hot like the semi metallic do either.
I am in the 225lbs range and run the Sintered front and rear. I find the modulation excellent and the power plentiful. The T100 Sintered may require a bit more fine tuning to keep quiet but well worth it. I run another brands 220 Rotor, hoping Hayes comes out with their own 220 rotor and Post Mount.
Love the lever action, modulation, and power of the A4 Dominions!