I've just ordered one, hopefully going for a blast round dalby for its first outing at the weekend 😀
I was inspired by the fact that it's apparently just a mechanical spring (so no seals to replace?)
I have tried a crank bros joplin before and found it crap. Didn't like the way it could still go up on negative pressure differential when it was the low position – i like to be able to pick the back end of my bike up by the saddle. Didn't like the potential for faffing and not knowing where it is at any one time that infinite adjustment gives either. Add to that the fact that it is hydraulic and pretty complicated, so there is quite a lot to go wrong – the bloke in the shop i got it from said crank bros have got something like over a 100 patents for it, that's some seriously complex engineering going on there.
Saw a couple of blokes with GDs at CyB last year, and was quite impressed by how simple and strong they looked, have been umming and aahing ever since. Decided to treat myself to one for xmas… I'm hoping the fact that it's simple in its design will prove it to be long lasting.
also worth noting CRC do shims from 27.2 to pretty much any other size of seat post.