USAT Nationals

How many people have done a USAT Nationals race?

What race was your favorite.  Which was your least favorite?

I will be doing my 2nd USAT Nationals race in two weeks (Standard Distant Duathlon).  I know the Multisport festival (Aquathon, Duathlon, Draft Legal Tri, Mixed Relay, etc.) isn't as popular as the Sprint & Olympic Triathlon Nationals but wanted to hear what people have done and what their personal experiences were.