Sooo much fun!
It has beginner, intermediate and expert areas full of hills, boards/logs/rocks/stumps and even teeter-totters. Theres a separate section with a BMX part (Rhythm Room) and a bowl.
I have never been mountain biking either so no worries even newbies can do it- and not kill yourself!
Its cheap to go $19-$24 and includes helmet, elbow pads and shin guards. $10 to rent their bikes (which we looked up were $3000 bikes). I found them quite indestructible (I did run into a wall or 2 but if you just get off the bike you wont get hurt!)
You can check out the place on youtube.
It also has an area you can rest or spectate with tables, fooseball and fireplaces!
Did I mention it's soooooo much fun!