I'm looking at flying from Melbourne to Christchurch, but can save a considerable amount if I go via Sydney. I could fly to Sydney, but that relies on using Jetstar for my connection there, who I don't trust for critical times.
There's an overnight train which gets in with a three hour buffer, which would be fine for me if on time. I'm wondering if there are statistics online about how reliable this service is, in terms of how often it runs late, and if so, by how much?