I was going to write about Adabana after I finish it, which is going to take some time since I was going through it very slowly and currently I completely switched to Iwaihime. But, yeah, it's pretty good. Especially the art and the music. As for the story, it's interesting, but I'll judge it after I complete the whole game, I guess.
As for Iwaihime, I'm currently at chapter 3, (yeah, I'm still slow) and it seems to be slowly getting better, even though the horror parts are still pretty disappointing. On the other hand, Ryukishi was always pretty good at writing character drama, so it could work in the end after the meaning of the horror parts becomes more clear.