Just finished this game after about 3 days of sleuthing.
10/10 - Would recommend to anyone who enjoys logic puzzles and/or genealogy.
It was so much fun! The puzzles and clues are spread out just far enough so that connecting them is a challenge, but still close enough so the solutions don't feel too obtuse or abstract. Even seemingly little details and jokes turn out to be useful branches that provide plenty of useful information. Some of the final details such as last of kin or some of the non-blood relation's names come down to process of elimination, but it never feels like brute forcing it.
The tone itself is also wonderful, a mix of sarcastic humor and just a slight edge of suspense. Personally I got a bit creeped out whenever our mysterious client showed up and I loved that unease. It reminds me of the game "HER" if you've ever played it, with how creepy the mood gets as more dark secrets are revealed.
If I was forced to give this game any criticism, matching the faces for the family photos (especially Free Spirits) was a little daunting at first, but once you manage to match a couple of faces to names, it becomes a process of elimination. Also, maybe adding the option to turn off "slow loading internet"?
Funny tangent: I was absolutely stumped for a while because I thought I had the remaining branches solved but wasn't making any progress. I finally realized that I had correctly deduced that someone was president of the Roottree Company, but I picked the wrong number. Chalk that up to my own tunnel-vision rather than poor UI.
SPOILER
I immediately knew there was something up with the farmhand when I could take his picture from the photograph. I don't know if that final branch is supposed to be super difficult or just a bonus for those who have been paying attention, but between that and the one-off mention of "Mr. Miller", I had a feeling it was something to keep on the back-burner.