It's made a really big difference to the ride quality, my bum is actually in the right place now.
negatives:
I wish it had some markings on it regarding the height of it in the seat tube.
Also seat clamping Mech is a bit long so robs the seat of some fore and aft movement.
Hard to apply strong clamping force compared to a single bolt mech.
Positives:
Seat angle markings.
Two bolt mech makes minute angling possible.
Very light.
Oval shape inside seat post adds strength.
So far I'm loving the difference it's made.