Here is my basic view:
Here is a shot to show the information that is displayed when the cursor is moved over a colored segment:
Here is a shot of my overall Finnish segments from the Advanced View. In this shot, I chose a minimum segment size of 5cMs and matches who have grandparents from up to four different countries. When the cursor is moved over the Finnish column, all matches except Finnish ones fall away.
These charts show the effect of the Finnish contribution being halved in my genome. My mom is 50% Finnish and I am 25% Finnish.
Here is my full advanced view set at a minimum of 10cMs:
From this analysis I can deduce that this match who has three grandparents born in Canada and one in the US is related through my father's mother's ancestral lines. Interestingly, so far on Relative Finder I have no known matches on my X Chromosome. Therefore, this example also demonstrates that this tool is providing information that was previously unavailable to us.
Lastly, take a look at my chart with the segment setting at a 10cMs threshold and matches with (at least) three grandparents born in the same country:
And my mom's at the same settings:
FOR MORE INFORMATION AND CLARIFICATION OF THE ABOVE IMAGES:
Here is the Tutorial Screen:
And the Advanced Controls Help Screen:
I believe this tool will prove to be useful to many of us and, at the very least, interesting and entertaining to the rest. It gives us an overall look at the ethnic background of our genetic matches as well as our parents' individual ethnic contributions to our genome if we have been able to test at least one of them. Further, as demonstrated by my match on the X Chromosome, it does give us some limited information that was previously unavailable in regard to some of our matches on Relative Finder who have yet to accept our many outstanding invitations. That, in itself, is a positive step forward. Keeping in mind the inherent limitations of an application that utilizes user-submitted data that's scope only reaches back a couple of generations, in my opinion, this is a welcome addition to the tools available to individuals in their quest to discover as much as they can about their genome.