Optus provides decent prices and services. In saying this their prices could be cheaper and their included download limits could be a lot higher for the price.
In saying this optus usually makes up for this in their included bonuses.
These such bonuses usually include things like
Shaped plans
Bundled inclusions such as home phone and broadband packages, that give cheap calls and home to mobile bonuses.
Sometimes such home to mobiles are optus to optus for free 24/7
In all optus works great as a bundled service rather than a standalone service.