My experience
I have the seatpost, stem and Road Scholar bars on my Six13. I really like the seatpost since I need a zero setback on my Dale. The clamp looks dodgey, but works flawlessly with lots of adjustment. The stem is carbon wrapped and is not the lightest around, but it's stiff and hasn't caused me any problems over the past year. The jury is still out on the bars. I like the shape and the reach, but they slope downward from the stem towards the drops a few degrees. To compensate for this, I've had to flip the stem. It's not a silly positive rise, but I don't like the aesthetics. Also, the downward slope is not comfortable for long stretches on the tops. There is, however, a sweet spot on the top of the bends running into the shifter hoods. I find this the most comfortable spot on the bars.