Novated leasing can be a great way to get a car and can save a lot of money but you've got to be wise with what you buy. It's all about the residual value i.e. the difference between the final payment and what you can sell it on for at the end of the lease. Japanese cars (Toyota, Subaru etc) will always make you money. Stay away from high depreciating Holdens, Fords and "disposable" Korean makes.
Also the shorter the lease term you can afford the better. You can pay off around 35% on a 1 year lease but this only rises to 55% for a 3 year lease for example.