Recommendation: I replaced my stock front derailleur with one of these after having a nightmare of a time trying to get it to shift correctly. The X9 works like a champ.
Pros: Super fast shifting, great in 2x10, durable build
Cons: price
Recommendation: This was the last piece I upgraded to x9 for my drivetrain and the piece I noticed the largest change in. I expected it to be a little better than Shimano Deore but it blew me away.
Pros: -Super smooth shifts
-Light weight
-Bling factor
Cons: None
Recommendation: I replaced my stock front derailleur with one of these after having a nightmare of a time trying to get it to shift correctly. The X9 works like a champ.