Pros: Stiffer spider that I would have expected. Decent bottom bracket that is buttery smooth.
The gearing when combined with the 11-36 rear 10spd cassette is awesome. Up and down shifting with these rings works much better than 2010 3X9 truvative cranks. The stiffness is great specially when off the saddle and cranking away up hill.

Cons: None.

Recommendation: The X9 crank is a crank that will really up your riding experence. If your a trail rider or XC rider this is something you really should check out. If your even an AM rider who doesn't need a bash this still is for you. Combined with the rest of the X9 group the cranks really works awesome. Shifting is fast and doesn't fell like it crashes into the next ring, either up or down.