On insurance website InsuranceNEWS.com.au there is an article looking at whether buying AMI would be a good idea. There is no conclusive answer, but the discussion is thorough.
One fact that seems to have escaped both the writer and the critics of AMI relates to the concentration of insurance in Christchurch. While criticising AMI of having too much exposure in Christchurch, no mention is made of the history of AMI and how, as SIMU (South Island Motor Union), it had been based in Christchurch with major local support for many decades.
The article is here.