Yes, we have and I wrote a hub on it. This was on my father’s side of the family and the results were quite shocking. We were not whom we had always believed ourselves to be, and we are almost wishing that we had not had the test done. On the other side of the family, my mother’s youngest brother who is now in his 80s has just submitted his DNA test and we are awaiting the results. Whatever happens with this test will be informative because we know that the family has an assumed name. It was assumed for political reasons at least 300 years ago along with thousands of others who assumed this name in Europe to hide their true identity. [It was NOT changed when the progenitor emigrated to the American colonies in the 1750s.] We are hoping it will tell us who this line really is. Also, there is some speculation as to whether this line is French or English, as people in both countries assumed this name.
I think that all in all it is worth it to know who we really are, especially if you family came through Ellis Island and the officials changed your family name. None of my family came through Ellis Island, however, in doing genealogy I did find two Jewish lineages whose names were changed when they converted to Christianity in the old countries, which may account for my gluten sensitivity. I think for reasons of health the DNA tests are worth it.
Our family DNA tests were Y-DNA, (male only) so I’m thinking about having a matrilineal DNA test done to find my mother’s ancestry. In my opinion these tests are definitely worth it.
Just a note: Ancestry.com is stopping doing DNA tests and we have until September to move our files to another DNA website so we can keep comparing them with new tests that come in. I think the fee is $19.