I rode there more when I lived up in that area (Stockertown), but since moving down towards Quakertown, I don't get up there as much.
It's a fun place to get out for a relaxed ride, nothing super technical, and there are some fast/flowy sections.
They have ruined some of the better sections the past few years, with widening of singletrack, and removal of some technical climbs.
I know Curt's Cyclery in Nazareth does a Tuesday night ride there, their a good group to ride with.
A fanatic is one who can't change his mind and won't change the subject. - Winston Churchill