The Good: Powerful, consistent, reliable, durable
The Bad: routine maintenance is required for peak performance
I ran these brakes hard this season- bike park, dh shuttle laps, aggressive trails. What impressed me most was the consistent braking power even on the longest downhills. The oversized ceramic pistons and ice tech brake pads keep the system fade free. The lever design is comfortable for 1 finger braking. I found the tool free reach adjustment very convenient. Coming from Avid brakes, I had to get used to the power of the Shimano brakes. The power comes on more quickly, requiring the rider to not drag their brakes. SLX brakes require less pressure to engage thereby reducing hand fatigue. In addition, I feel that I can brake later into corners which increases my speed.
At $125 per brake, these are the best performing brakes on the market. Get them. You won't regret it.