I had the forged versions and they were fine but required a fair old squeeze on steep downhills, especially in the wet. I originally bought them because they were nice and light.
I then bought a bike with Ultegra calipers and the improvement was massive. I nearly went over the bars on these, and had a few unintended stoppies going into roundabouts – the Ultegras were so much more immediate and solid.
For a lightweight build used on flat-ish terrain they’re fine, but I would accept the extra weight of the Shimano’s for the superior stopping power.
I’d get either the new 105 (5800) or Ultegra (either 6700 or 6800) – I have each of these on different bikes and they’re generally excellent.