Garrettwrote a review of KS LEV Dropper Seatpost on April 29, 2016
Familiarity: I returned this product before using it
First of all the cable and housing that come with this post are absolute garbage. They're wound so tightly in the package that they have preset kinks already in them. I wasn't even able to feed the cable (plastic btw) through the housing it was so bad. Upon realizing this I grabbed a standard derailleur cable, which it says it's compatible with, to feed through. Now that I got a cable through I proceeded to thread it through the spring and end clip that actuates the post. Doing this was pretty uneventful except for difficulty bending the cable back into the clamp mechanism. I managed to do this while cutting the cable to the right length. However, the set screw that clamps the cable in place is not compatible with standard derailleur cables. The screw will not sit flush with the clamp, creates interference, and will not allow it to actuate. After realizing this I decided to at least try to hook it on and see if it would actuate. Apparently they use a plastic cable internally on this as well because this broke and pulled out. My seat post collar was not tightened, so that eliminates any possibility that it was bound up from anything I did.
Overall I'm extremely disappointed with this dropper. I can get over the crappy cable and housing that was supplied, but the clamping mechanism and internal cable seem really poorly designed. Seriously, who thought it would be a good idea to use a plastic cable internally? After this experience I can say I will stay far away from any KS products in the future....