I know someone who moved to Auckland from the UK. He said that it's a slower pace of life, good standard of living with large houses (by UK standards) and quality healthcare.
That fits with my experience also. It's a massive generalisation but I also find people are a bit more relaxed here about everything - perhaps that has to do with the pace of life, but I think it's kind of a cultural thing as well.
One comment - houses here are generally larger than your average home in the UK, but much more poorly insulated. A good percentage of houses in the UK have double glazing, but you rarely see that here. The result is you spend a bunch on heating during the winter or get used to having a cold house, particularly if you're renting and can't take other measures. Having said that the houses I have lived in here have been built in the '70s or the '80s, newer builds may be better on average. You certainly can get double glazing and put in proper insulation, but although I've not actually checked I suspect the fact that few put in double glazing means that it's more expensive here on average than the UK.