Reverb is shaping up to be the definitive adjustable post. In use, it works so much better than either a Gravity Dropper or a Joplin. It has a couple of major benefits as far as I’ve experienced it.
It’s infinitely adjustable and because it’s hydraulic it’s actually really easy to set it right where you want it. You learn to gently squeeze the lever if all you need is a shallow drop. This is impossible on a Gravity Dropper and a lot harder to achieve in practice on a Joplin.
It’s utterly reliable; having had one for three months now I’ve had zero issues with it; it works as well now as it did three months ago, which is more than can be said for either the GD or Joplin, both of which really needed maintenance after a month of winter riding.
It has no play and doesn’t extend when you pick the bike up by the saddle. That doesn’t sound like it’s much an issue but it’s actually a bonus when lifting the bike over styles, fences etc.
You can easily buy them for £250, which is a LOT of money yes, but when compared to the competition, makes it very good value for money.