Pros: Clean crisp shifting considering the fact that they are plastic.
Great performance for the price.
Cons: Plastic shifters.
Two thumb levers (as opposed to Shimano's finger/thumb shifting)
Recommendation: These shifters work great for the price but I only have two concerns; well one concern and one gripe....
First of all they are plastic and plastic tends to weaken especially with the amount of shifting one would do on any typical trail. Basically they will eventually brake. Now my only gripe is the dual thumb shifting. Although I have gotten used to shifting my X5 shifters, they are not as efficient as the Shimano Deore XT( ) thumb/finger shifters as this set up allows you to keep your finger and thumb in position for faster shifting whereas you have to move your thumb up and down using the X5's. This may be a personal opinion but I think Shimano nailed it with their shifter set up.
These shifters came with my bike and overall they have not let me down and have worked flawlessly. I will probably keep them until one of them brakes and although I am a fan of Srams products (mainly because they are 100% U.S. made), I will probably upgrade to Shimano XTR's....