Well, I just watched it and I'll say I'm impressed. The entire thing ran flawlessly. (Which in itself is a bit sad that I'm actually "impressed" when a bug DOESN'T occur)
I've never heard of them or their songs either but the songs were very good.
It's a bit misleading that the event is listed as being "in the park" when it's actually not. I replaced that park ages ago and I suddenly got all worried that my new lot wouldn't be compatible and spent an hour digging out the original lot, backing up my new lot, replacing the original lot... etc. Then I went there at 12 and nothing happened... something went wrong with the lot? Is something supposed to be placed there automatically like the San MyShuno events? Is my replacing the lot and not being the original lot causing an issue? Will this only work on "NEW GAMES" and not any existing games? {heavy sigh} This will take a while to figure out.
I then got a notice to go there and my sim ran over to an entirely different area.
So, it's not IN the park, but NEAR the park. Okay. I actually LIKE how that was done. I just wish I knew about that beforehand, before I spent the past HOUR preparing for it.
Then the event started and it ran great! I noticed a lot of the sim's needs were frozen for the duration so I didn't have to miss any of the performance tending to those, especially since it lasted about 12 hours.
Overall, Kudos. Keep it up and release MORE stuff in this state. But tend to those bug fixes first. There are still FAR too many.