Brakes are definitely beast. I generally tend to avoid using brakes altogether if I can help it, but a two times I had to use them full-force due to reckless drunk drivers (I should stop riding on Saturday nights). I was riding at about 75-80km/h steadily and I reached 0 km/h in about ~1.5-2 seconds. First time ABS kicked in, second time I didn't need ABS but I noticed I came to a stop slightly slower.
Front brake is solid, rear brakes feel a bit iffy. I mainly use them in conjunction to front braking or if I'm cruising at 20-30km/h in the city or if I'm taking some sharp turns, for better balance.
They definitely feel better with usage though, I remember they were pretty stiff and felt like they were "sliding" on the wheels rather than making friction with them on the first few kilometers.