Pros: 125mm of travel, quick response, quality, remote
Cons: cable get stuck sometimes on colder days
Recommendation: Adjustable seatpost is a next most important purchase after buying a bike. It helps to fly over any technical trail and go faster on downhills. In other words this thing give me more confidence and help me to improve my riding skills.
I choose KS over Specialized or RockShox because of price. I'm using it for almost 500 miles now and it didn't fail yet. Now, when temperature drops to 32, I found a cable get stuck sometimes - a few drops of teflon grease fix a problem and shouldn't affect on overall rating of the product. Great deal for this price.
Pros: Gotta love a seat post that adjusts! the lever is small and looks great.
Cons: gets stuck about a half inch to the top when you retract it.
Recommendation: All in all i love it, and maybe i should lube/grease it up. When it does get stuck i just lift it up with my inner thys and good to go. No company has really mastered the adjustable seat-post. not even the Rock Shox with the reverb. I would strongly consider KS