As one of the "more trail, all mountain riders" from today's session can I echo what simonbea said above. It was great opportunity to ride round a truly awesome track with a couple of great coaches and a good mix of people.
Some of those obstacles would challenge most riders and the track doesn't let up, it's either up or down most of the way with little chance to catch your breath. How they get round several laps in sub-12min times on bikes with seatposts high and little travel I'm amazed, it's given me serious respect for those athletes.
It was nice to talk to Matt from the Essex Cycling Development Team about their plans for the site. He is really behind plans to maintain it as far as possible. However, even on these coached sessions there have been a few mishaps, one guy today will be heading to hospital, so don't let the camera fool you.
At the end we were interviewed by Stephen Chittenden (not sure of the spelling) from Radio 5Live for a programme they're doing on the Olympic Legacy. Have a listen out on the 30th November!