It is fairly mild, there are lots of mixed opinions on it.
The bars at the side point down and act similar to a full cheek - Assisting lateral aids. The strap doesn't really do anythign except keep it weighted properly. The bit is designed so that when it is 'passive' the horse can hardly feel it because of the weight, thinness, and ergonomic design.
Of course because it is thinner you have to be more aware of your hands.