I thnk we're all missing the fundamental flaw in their business model, and why they are doomed to failure:
Someone's house/flat/room has, of course, a level of storage suitable for someone who actually lives there. A real, non-zero number of drawers, shelves, cupboards, wardrobes to unpack your stuff (out of sight) to and forget it's there.
Nothing makes you yearn for a no-nonsense 1 drawer (plus 5 fake non-opening ones) and 1 wardrobe setup of a Holiday Inn, than that moment where you think you've packed (in your airbnb), do the under-the-bed check, then wonder what that drawer was that you haven't had cause to open this morning...Before finding a pair of shoes you nearly left behind, and vaguely remember it was your great idea on check-in day to put a pair of shoes in there.
Thus creating panic and anxiety of having to triple check all these new weird and wonderful and unnecessary storage places that may or may not have seemed like the perfect place to quickly store your shaver/laptop/coat/bible 5 days ago .
It'll never catch on.