I just bought the full bundle, but it looks like the transparency on the houses is really wonky - at least in SRPG Studio. The assets don't really line up, and usually none or only half of the tile's background is transparent.
For example, the chimney with the curved base that's meant to fit along the roof takes 4 tiles (2x2). One side is transparent, and the other side is like "forced" transparency" that will overwrite any tile beneath it. This results in the roof below turning into the ground layer. And the shadowed files don't really make sense, as the way they're structured results in gaps
Unfortunately, this appears to make the entire asset bundle nearly unusable. I opened the PSD files and see that they should be fully transparent, but within the engine they're only partially transparent and do not layer properly.
I was really excited for these. They look phenomenal. Though I'm not sure I'll be able to use them. Perhaps they're just not compatible with SRPG Studio.