I've got on on my SS. The Groovy Disco Stick is only available if you buy a frame, and there's a 5 year wait for those at the mo.... all the other posts, like the Spin one, have no layback - oh, apart from Van Nicholas, they do a nice one! There's the USE Sumo post in Ti too isn't there?
Anyway, the Eriksen post was £30 more than the Van Nicholas and £50 less than the Moots.
I'm a big fan of Ti seatposts, they take the edge off a treat, leaving my bottom feeling fresh after a hard ride whilst others have taken a real pounding...
Hope the clamp is better than the canondale one - mine lasted 2 mins of my first lap before giving a great crack and the saddle pointing skywards :evil: