Vietnam - Best Place I have Ridden

Vietnam is located in Milford MA which is a 3+hour drive for me. The signage is pretty terrible, the parking is a little vague (might be good but not well published).  Most of the trails are missing from trail forks and the map at the NEMBA is all but useless because it does not include a lot of whats out there. Meaning you cant ride from a starting location and say ok next right is X trail because there are 7 trails not on the map before you get to X trail. So why is this place the best of I have ridden?
I has everything I want in a riding area. Some flowly lines, lots of chunk, rock rollers, sick steep rollers, jumps, big jumps, gaps, big gaps, drops and big drops and BIG BIG DROPS.  There is some elevation but nothing bad. Alt lines everywhere.