We have used the team at Westralian Insurance for our home, car and business insurances for several years, and can definately recommend them.
While they do ensure we get the best deal out there - more importantly, they ensure that we are getting the right product - it's very easy to find a cheaper policy, but then get burnt when it comes time to claim.
We've had a few claims over the years, and the team at Westralian have always been helpful with the process.
For our work insurance policies (workers comp etc), they have always been quick to send us certificates of currency (which we need to provide to our clients)