I don't have pics, but my 6x9s are in the bottom of the door.
The good:- Sound travels well from this location
- Cheap
- More foot room than kick panel mounted speakers
The bad:- holes have to be cut in the door (this is permanent)
- must route wires into door and protect the wire
- speakers get kicked a lot
- pressure from shutting the doors may damage speakers
- any leaks around the window often end up in the door. There is a drain hole at the bottom of the door, but the speaker (if not in a "cup") can get wet.
If I was to do it again I would probably do kick panels. Mostly because of running wires into the door and having permanent holes in the door. I guess the holes could be covered up with a carpet piece, I like the painted steel though.