Uneconomical? Yeah, not great on mpg. Only 3mpg worse that a Zed, though.
Burns oil? It's by design, it keeps the rotor tips oiled from the sump oil. Fit a second bottle full of oil to pump in and you'll never burn the sump oil again,
Always go bang? Nope. They do need a rebuild from time to time, but again that's by design.
In return, you get a beautifully smooth engine that never lugs, revs to high heaven and sounds very unique, whilst contributing a low CofG allowing the handling to be sublime.