Funnily enough, we've just stayed in a very badly converted/extended holiday home. Corridors and landings everywhere alongside different levels. Really annoying! So much wasted space that you're constantly walking past/through.
Then the rooms themselves were huge and looked pretty stupid as they were (typically holiday cottage) pretty bare, such as a gigantic loft conversion for the master bedroom with a standard 4'6" bed at one end and a tiny single wardrobe at the other end! A huge family bathroom with a tiny shower cubicle in a corner! The main living area was a square extension that had a tiny/basic kitchen in one corner and just a bog standard sofa and TV Stand stuck in the middle with a tiny circular dining table/chairs in another corner. Despite lots of space, they didn't even have a full height fridge/freezer - just small/basic low level fridges and freezer separate under the worktop, and the washing machine/drier were in an outhouse!
It was really strange to have gone to the time and expense of extending/converting a building so badly (the owners had done it as they had a folder of pictures proudly showing all the stages of conversion from the sorry state it was in when they bought it to the converted state).
The actual floor space would probably have allowed for it to be four bedroom, but the way it had been extended/converted with all the corridors and landings meant there were only two bedrooms, but by God, they were huge. They could even have made them both ensuite (the water supply and drainage would have been possible) but instead had a huge single family bathroom between them. No downstairs loo despite there being lots of space for one.
The thing was that they'd done a lovely job on the "soft" stuff like curtains, bedding, fabrics, cushions, sofas, etc., straight out of a glossy magazine, but completely screwed up the practicalities of the layout.