Now that I have it installed, I love this dropper. So why the 2 star review, not 5? I literally broke 2 posts before I got a 3rd working. The issue is with the metal casting (magnesium?) on the bottom of the post that holds the cable is the thickness of a nice business card and extremely fragile. Seriously, if you drop this post, twist the post in your frame, or just look at it wrong you will break off that casting and your dropper becomes an expensive paperweight. The first post came slightly bent (damage from shipping), it broke when I tried to bend it back to straight. It was amazing how little force it took to break it. The second one, I had in the bike and it was SOOOO close to being low enough... but it was just a few mm too high. I gave it a little twist and push to get it lower, not putting much force on it at all... TWANG! It broke the casting off the bottom AGAIN. WTF!?! It broke because the cable housing was binding against the internal hose routing tube in my bike... it broke with just the twisting force of one hand on the saddle with a bit of down pressure. So fragile. When I took the post out, one side of the broken casting was still pretty tall. Just to see how strong it was, I bent it over and I was able to break it off with my thumb! Fox needs to make that thing way stronger. I get that it is hidden inside the seat tube and only needs to be strong in one direction (cable pull)... but it is just way too fragile. Mountain bike parts should be reasonably durable in all aspects.
3rd time was a charm. I got the 100 mm version so it could go low enough for me and I was VERY careful installing it. The install is actually super simple (if you don't break it!). It is now working flawlessly. I am very happy with the performance. I have only a few rides on it, but it is safe to say that I love this dropper. I am using it with the left thumb, that is in the place of the left shifter on a 1x setup. The location is so natural, it really is convenient to use. The lever action feels great, the dropper action feels great.
I like it more than the Rockshox Reverb Stealth that it replaced. The feel of the lever is better, the action of the dropper is comparable, the location of the lever is WAY better (thumb falls right on it like your old front shifter, where the Reverb you need to reach up a bit), and NO BLEEDING. The quick disconnect is nice too.
Bottom line, get the post, but be extremely careful with the bottom bits. Seriously, if you drop this post on it's end it WILL break. How many mountain bike parts are that fragile?
Big thanks to Competitive Cyclist for no questions asked replacing the broken ones. They made the process super easy and even shipped me new replacement posts while I was waiting to send the old one back. That service made me a loyal customer!
Attached photo is of the broken casting at the bottom.