I went Sunday and it was fun to ride so many bikes in the two hours I was there. My favorite rides were on:
"Big Bud":
http://www.electricbikeattack.com/easy-motion-evo-fat-tire-awd-electric-big-bud-2016/
the E-stream EVO-FS-3-29:
http://int.bulls.de/en/bikes/show/e-stream-evo-fs-3-29/
and the Panther PS1:
http://us.besv.com/products/ps1/