Jestepwrote a review of KS LEV Dropper Seatpost on July 7, 2016
Familiarity: I've put it through the wringer
As soon as you get this, open the package and throw away the cable and housing that it comes with, just so you don't have to even mess with that disaster. Ironically this is what 2 bike shops told me when I was trying to find a replacement power cable that broke on my second ride. Use a normal shifting cable and housing and make sure use the set screw when installing.
Once you eliminate that problem, this works flawlessly. The fixed location on the seatpost makes this far superior to the other external droppers where the cable is constantly moving up and down.
There is a small amount of play in the main shaft out of the box but it's on par with every other dropper I've seen.
The dumpster fire of the included cable system easily deducts a star from this product. I truly can't believe they would include such a poor quality cable on such an expensive and otherwise excellent post.