The Mikado is my favorite G&S and I may be rating this low at 7, because certainly it's worth watching in any decent form. But I find the production a bit offputting.
The approach is odd, replacing the usual Japanese setting with what appears to be a semi-amateur 20s show. I don't really understand what they were going for with this, it just seems like they thought it would be cute to do it, but why not do it well, at least. At first I thought perhaps this was an early attempt to deal with complaints of its portrayal of the Japanese, but since at times the white characters pull their eyes into slants when they say "Japan" I'd say not.
Performances are mixed. A lot of people seem to love this Katisha but I didn't feel she was exceptional. Same thing with the celeb casting of Eric Idle, who also sings the greatest travesty, a Got a Little List with rewritten lyrics, which wouldn't be terrible if they were as witty as the originals but are just downright lame.
I did not object to the video effects that seem to aggravate some other reviewers here, and don't understand why that's a sticking point.
There are cute moments, the choreography is sometimes entertaining, and it's got amazingly funny songs sung by talented operetta singers and a kooky story, so like any competent version of The Mikado it's worth checking out. But it didn't really work for me.