They are only as accurate as the information they have submitted by subscribers as far as I know. I tried their free 2 week trial, looking for one obscure and lost branch of my tangled family. I hit a lot of dead ends and decided it wasn't worth the 12 bucks a month.

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You're a daisy if you do.
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84 Euro 240D 4spd. 220.5k sold
04 Honda Element AWD
1985 F150 XLT 4x4, 351W with 270k miles, hay hauler
1997 Suzuki Sidekick 4x4
1993 Toyota 4wd Pickup 226K and counting