We moved to NZ just over 2 years ago and don't regret it for a second but it's not for everyone, we've met more than our fair share of Brits over here who expected to have all of the pro's of the UK (comparatively high disposable income, cheap goods, choice when shopping, etc) with no drawbacks. As I said to them, if NZ (or Oz) was perfect then you'd never meet a kiwi or aussie working in the UK so it's worth doing plenty of research in advance. Also check out the areas you might want to live/work, in NZ there is a different "feel" in the main cities of Auckland/Wellington/Christchurch (and elsewhere).
Personally, we love it, hard to remember what our lives were like before, friends and family in the UK have all commented that we've gone from being content to loving life and that sums it up pretty well.
All of this is despite us currently living in someone's granny flat with our 8-month old daughter because our house is being rebuilt after the 7.1 earthquake in Sept that hit about 5km from our house. All part of the adventure!