I have not, but my niece and her mom did. They both knew they had lots of Italian, and my niece has Polish blood on my side. But they found a lot of interesting things, like .03% Asian, which, believe it or not, you can see a little in their eyes. Lots of others, but I do not remember what.
An interesting thing they learned, is you apparently get more of your DNA from your mom, which is why if they trying to find out someone;s DNA they check mitrocondial DNA. My niece explained why, but it was a while ago, and I do not remember exactly.
They both did the more expensive extended test, where you can finde relatives. My ex sis in law's came back that there was a 100% chance that my niece was her daughter.