Not personally but Brocks have good gear and I have used a few of the products on the bike so far.
The biggest factor in changing out the factory system is the weight saving.
Just changing to slip ons will have a big improvement on pure weight saving.
The factory headers can be modified to remove the cat but having a standard system to go back to if you run fowl of the law is a must.
The shipping for Brocks gear is not cheap to Australia.
There full systems also exceed the 1 K tax free benefit.
A good set of Akrapovic Headers and a set of Light weight Slips that suit your style would be a better cheaper option.
If cost is not an issue how about approaching a local manufacturer and designing your own or go for a full import.
I went for a fairly cheap slip and it has 3 baffle options. Quite/loud and Unrestricted.
The weight coming off the bike was the biggest advantage by far over what it would show in HP gain on the dyno.
This is just sample of what can be saved with small slips.