Stopping Power on a budget.
These are a good strong set of brakes. The price reflects the 'entry level' nature of these calipers, but as someone who descends like an absolute loon at times, I've never worried that they won't stop me.
They do feel a bit less sturdy than the Ultegras I've used before, but there's absolutely nothing wrong with them.
Biggest problem on these is the huge decals on them that say SORA in bright white letters so everyone knows you're a scrub/tightarse. If you're not proud, go for it!