The butterfly element looks like it pull a lot of laterals. Does it?
It does not pull very high laterals from my experience, but it is very disorienting in a good way! You basically change direction four times. If you have been on Tennessee Tornado, its very similar to that vertical loop in my opinion, just with two loops instead of one.
My personal opinion of Ninja is that it is a great, unique and intense multi-looper that will hopefully live on for a long time. The refurbished Arrow trains have made the ride considerably smoother and they look great. It has a few kinks in the track, and it may provide headbanging to shorter guests, but I never have a problem with it and it's smoother than almost any Arrow or Vekoma looper I've ever been on.