I took a semester of Japanese JJ in Portland, Oregon and absolutely hated it. It was incredibly (overly) structured in stance (most of it wrong for street-defense, like punching from the hip). It reminded me alot of Tae Kwon Do. Nothing at all like BJJ.
Maybe it was just a bad school and maybe it didn't even accurately represent Japanese JJ. For me, a good school emphasizes faster, fluid (realistic) movements and less emphasis on minute details like "your foot needs to be half an inch forward" or "your wrist needs to be turned 15 degrees more counter-clockwise". Unless you just don't care about the self-defense aspect of martial arts, this kind of garbage is better left for a Japanese tea ceremony (which I think is garbage, too).