1) Lube the threads of each bottom bracket cup, insert the drive side BB cup and tighten it to 47 N-m, insert the non drive BB cup and tighten it to 47 N-m.
2) Lube the race on the crank arm spindle, insert the spindle with its nifty guide cap into the BB, give it a few taps so that it lays flush against the bottom bracket, remove the spindles guide cap.
3) Lube the spindles spline and the non drive side crank arm threads, put on the non drive side crank arm 180 degrees to the drive side crank arm, tighten it down with a torque wrench with a 8mm socket to a monstrous and manly 61 N-m (it takes a lot of turning to get it there).
The shifting was fine, perhaps not quite XTR, but pretty darn close. The gear changing between 22 to 32 to 22 was fairly short, and it made the jumps quickly, even under extreme loads. I felt no flex in the system, so it was as stiff as I could discern. The simple subdued graphics were a welcome change from the usual advertisement patterns of some bike products, and the cranks had an understated and functional look to themselves. They came with their innovative ‘Pedal End Boots’ (two colors), which go over the end of the carbon crank arms to protect them, like bashing hard into rocks, which is common, especially in All Mountain terrain. They are such useful units, that I have used them on other cranks, even non carbon ones, and at only 16 grams a pair, they are light, and offer extra cushioning when banging into things. I have slammed the cranks down hard on the bashguard, and it shows minimal damage, and certainly helped protect the more fragile teeth of the chainring.
The SIXC cranks are stiff, offered instant power access, were highly efficient, with no noticeable slop. I do a lot of slow speed hard torque moves on technical terrain, which puts incredible amounts of stress into the drivetrain system, and these cranks were superb in that realm. They offered fast acceleration, and provided a snappier feel while cranking and mashing on the pedals. These cranks are currently in a category by themselves, since no one offers an All Mountain carbon crankset.