If your window is large enough, you may not have a choice. In the photo those shades appear to be semi transparent anyway so a break of light between them covering a larger window may not matter. If in the other hand you needed something room darkening that crack of light between the two shades will become a big deal. I was surprised that they had the shades pulled to different heights on different sides of the room. I think that looks odd in a pro photo....

I don't care for it split in the middle of the picture window. If I needed to split it I would do three: one on each side window and one in the middle lining up with the mullions between the window units. To me this looks like they used off the shelf blinds that added up to the right length.

Agree with pal to do three. With your narrow side windows, I'm not sure about a separation between windows though. Shades alone would be pretty in your LR with your window molding. The drapery panels were looking too
light and bedroomy to me and creating too much pattern conflict.

It looks best with 3 shades, 1 over each window. I have a window like that, and whether I hang shades or blinds, that's the best option. One large one isn't a good option either.

I think three looks best, too, and was surprised to see this large window handled in such a way. The only thing that appealed to me was the off the shelf aspect, but I also wouldn't like the sliver of light where the two shades meet. Our window is so oddball sized; 19.5" on the side windows, and 64.5" on the center picture window portion.

I see Lars found has a 120" patio shade from Home Depot mentioned on another current thread, and wonder if it could be trimmed and used on our giant window?