Measured between real footprints. 36″ for a main route, 30″ for a minor one, 14–22″ from sofa to coffee table, 36″ behind a dining chair, 32″ for a door to open.
People aren't rating the furniture library. They're rating being asked to subscribe before they were shown anything, and then losing an afternoon's work to the very upgrade they paid for. Both of those are choices, not accidents.
Not "does this look nice" — you can see that yourself. Will it fit, and can I get past it. Every layout is checked against real clearances and anything too tight is named, in inches.
Flat overhead plan, not 3D and not a render. It won't show you what the room feels like. It will tell you what fits and what you'll bark your shin on, which is the decision people are actually stuck on.
Whatever you type here is what gets drawn. The app never adjusts your numbers.