I tried EBC on one SVT Focus and my first Fiesta ST. Yellowstuff on both.
They're marginally better than the OE ST pads, aside from dust production. They do not bite as hard as Hawk 5.0s or Stoptech Sports (which are my go-tos now; $76 for fronts from Tirerack). They do not stand up to actual track day driving (no one I know who does track stuff uses EBC). They're okay for autocross.