It most certainly is legit this is the final design.Was there ever a design change?Are the renderings legit? First time seeing this thread.
There was actually a major design change this was the original proposal ..
It was originally planned to be 388m (1273ft) to the tip of the 'spires' and 108 stories tall however an aviation ceiling (PAN-OPS) came into play and the building redesigned & reduced in height to meet that ceiling of 319m (inc BMU) however the '108' (referring to number of stories) was retained in the name.
I think the developers ignorance of the aviation limits actually resulted in a much better tower. The original was intended to be one of the tallest largely pre-fabricated buildings in the world but the design now U/C is more conventional.
Here's a closeup of the controversial 'Starburst' features which will house the recreation areas & infinity pools.
Thanks to Urban Melbourne http://urban.melbourne for the images
While the top floor (Level 100) features a penthouse that has already sold for A$25m - a record price for an Australian apartment to date.
Finally an excellent video can be found here ..
Taken from their website ..