I rode it for the first time yesterday, thought it was pants really but I can see why other people like it.
It's very accessible, mostly it's been designed around giving easy access to people from places like Chester and Wrexham. From the point of view of encouraging people to get out on a bike, it is really excellent.
The trails, all of them, including the black runs, are groomed to within an inch of their life. They are 'three quarters to dust', smooth and bullet hard like a BMX track. The black runs in particular are like pump tracks so if you can pump, they are sort of entertaining. They really need you to know where to carry speed though so on first approach it can feel a bit of a slog. I had to session a few places to really start to get any sense of fun.
There are clearly a lot of other pump/bmx like sections that are just waiting to be opened but are not yet rideable.
It's a very different place to CYB – it is very man made but it should be applauded for what it sets out to do.
Penmachno is more fun but a lot of it is getting very overgrown. I rode that on Monday and scratched my left arm to bits riding up against the brambles. That trail also really holds loads of water so even if its not raining, you can get soaked. But it is still a pretty good ride.