It is a little weird looking until you get used to it. It shares the same neck shape, scale length, bridge, trem and Trisonic pickups that the RS has.
It also has great upper fret access. It was built by Andrew Guyton to plans brawn by BM around the time, or just after he had built the RS
No it hasn't been used live, although more variations of the RS have been used since 2009 then at any other point during Queen's touring history