Dog DNA testing has anyone tried it?

I have been very curious to try one of these Dog DNA tests on both my dogs. Just out of curiosity and for fun. I have my ideas on what my dogs maybe but would really love to see if the test matches what we think they are. Has anyone used one of these tests and were the results what you expected or even remotely accurate?

Looking for an at home dog DNA test that is fairly accurate and not as expensive as veterinarian administered blood tests. The purpose of this test is out of curiosity and not necessity... Any input is appreciated...thank you for your help!

Just a curiosity question, I'm not a breeder.
Yep. I mean the in-store kits you can buy. The cotton swab test that you send in for analysis.
Yeah. I've heard many people get rediculous results. I wonder what would happen if I did a swab of my own mouth and sent it in...