Ok, down to the truth, I was also there, not the same concert but I was at the Stockholm concert and well, I suppose it depends ...
A month earlier I was at the LM-C concert and here is a few comparisons.
Ok, there was a lot less people of the LM-C concert, but honestly the "pump" was higher, the tempo and the music as well.
Ok, I can't denie Miku, he is sweet, so lovely, nothing bad against him, but the music was very "teenagesih" if there is a word like that, but it was ... with the duck and stuff, it was ... well, I understand why there was a 12y age limit.
Ok, it didn't destroy the concert, it was great fun, I mean, I can enjoy an occasional cartoon sometimes too. Despite a lot of warnings Mikus English is totally excellent, about fluent, not at all bad in the way some people had told me earlier that it would be !
But the show lacked some heat so to speak compared to the LM-C show, music vise more than other I think. I'd wished for more songs, more beat, heavier songs ...
but otherwise, it was great fun by all means ... like watching Donald duck on X-mas eve ... I'm not complaining !