A great show, based on the Monty Python and the Holy Grail story, but with certain meta aspects addressing the form of the musical itself, including the point where King Arthur has to stage a musical, and has to find a star to perform in it or it won't work. This does, of course, reflect the way that Jupitus is a known name in an otherwise pretty well unknown ensemble cast.
The first half was good, but I think it got even better for the second half. It was relatively short, finishing about two hours after it started (and there's a half hour for the interval), but the density of the comedy made it feel longer.
Overall, well recommended, even to those like me who would normally steer well clear of musicals.