An interesting development as a bat. The big edges are achieved by having a totally flat face and square edges, the low weight achieved through taking a large amount of wood out. The cubic mass of the bat is much less than many more conventional shapes which can affect performance. The swell is high but concentrated in a very small area. If you hit the ball regularly with perfect timing right in the centre of the drive the bat will perform well but slightly off drive because of the lack of wood it won't perform as well as other shapes. That is proven science.
The weight of a cricket bat is its volume times its average density. That is a physical fact; none of us can get around it.
Willow grades have an average density that will increase as you go down the grades. Bat makers may vary in their grading, but a Grade 1 will be pretty much the same average density as a Grade 1 used by everyone. There is no such thing as super light willow.
So, weights of bats will vary according to the volume of willow in a blade that really is what this boils down to. Seeing a big edge might give you confidence but this is misplaced if you think it will hit a ball further or more consistently.
If you like to see big edges and you hit with the consistency of a professional then this may be a bat for you. However if you hit slightly off centre the science shows you will achieve a higher performance with more wood in a more conventional shape and design.
Then there is the age old question of the square edge and its durability.....a question for another time!
Richard