We saw the Emigration group and decided that we would use them purely for checking, partly as there were health issues and partly for time pressure. If you are used to filling in forms, work slowly through it and ensure you have evidence from a third party then it is easy enough to do your own. You have to find all the information anyway and if you read the NZIS website you will see the order you should present it in.
Being in NZ I would agree should give you substantially more credibility with employers as you can see them face to face.
Good Luck whatever you decide.
I'll spread my wings and I'll learn how to fly,
I'll do what it takes until I touch the sky
Arrived Christchurch 27th June 2010
Start work 6th Sept 2010