mutley – yes, it is a GF ferrous.
Ride wise I'm pretty pleased with it. There's a bit more weight in the back end than I was expecting for a singlespeed but the geometry is spot on.
I've never ridden fork with more than 100mm travel before so comparisons are difficult but I took through some of my favourite woodland singletrack and it felt very stable and seemed to do everything I wanted and it isn't difficult to keep your weight forward on the hills (although I do play with the talas a bit on the ups).
Oh, and I'm not used to singlespeed either so a few of the bigger hills around Brighton have been a challenge!
So, overall – a big thumbs up 🙂