Like the others, I don't see basenji. That doesn't mean he isn't... but behaviors nor looks are basenji like.
Research has shown that DNA testing is a whole heck of a lot better than another poster spouted. Some people focus on what a person tells them, others of us look at scientific research. I have been found by over 20 relatives through DNA, a few adopted a few generations ago looking for family. I have known several adopted people who found out they were Jewish from DNA and tracked down family. So while human DNA for ancestry has a very long way to go, it's still fairly mindblowing.
As for dogs, the better companies have decent accuracy for dogs with few mixes, or predominate couple of breeds. They can validate sires with litters using more than one stud. While human DNA ancestry advances are helped by human records and verification, verifying dog DNA still works with blind studies (test dogs of known origin and see if the tests match). But equally important, the DNA tests also look at health markers. So doing both an ancestry and health panel is helpful as long as you keep in mind that it's useful mostly with dogs who have predominant breeds, not lots.
The top two are the Wisdom 3.0 and Embark. The more people who send in swabs, the more knowledge an accuracy grows. It's far from perfect, but still fairly reliable for 2 or 3 main breeds and very accurate for health issues.