I've never used a double shower, but my DH wants one for the downstairs bathroom we plan to eventually renovate. Do you like them? Would you use the space differently? I've attached photos of the current layout (the blank space is literally empty and weirdly unusable as is) and our tentative plan.

The whole room would be tiled in one big, open double shower (the floor plan app I used didn't have it as an option). The size of the shower room (current bathroom) is about 3.5'x8'. We figure it'll save money to keep the basic layout of the bathroom the same (we don't want to move walls, etc. unnecessarily). That's a closet on the top right.