Please read this announcement by Geni regarding the new matching technology, and take some time to add the records to your profiles, this will make our shared tree a lot more accurate and allow you to find and add many new relatives :)
http://www.geni.com/blog/introducing-record-matches-and-smart-match...
The record Matching I have found USA centric, (I guess that will change)
The Smart Matching is great, However at times I get an incredible number of very similar results, whilst in different trees.
Thus I worry slightly about the reliability of the smart matching as a lot of geoDat copying must have been done.
I have suggested to MH that they contact direct family members when adding info to the website, this will avoid embarrassing errors from occurring in most cases.
A good example is the death record of my mother, being listed as 0ct 73 instead of September 73.
Jason, your suggestion of the NZ BDM website is also an excellent idea, because their records are supposed to be immaculate, although this has proved to be not always the case as well