Ok, got my copy tonight. Have played through 13 or 14 of the songs on normal. Was pretty much able to get to there with no trouble, which is undoubtedly due to the fact that I'm currently playing Ouendan on ultra hard, and only have 5 songs left on that difficulty. After that, normal seems slow, and it's something of a challenge to not race ahead of the circles. But if you've never played Ouendan, you will find the game challenging (Ouendan 0wned me until I got the swing of it).
Anyway, there are certain aspects of the game I like better than I expected, and some are worse. What's better than I had thought? Well, the interface and animations are a bit snazzier than Ouendan's. The game has more polish as you move from song to song, and I like the animation frames as the agents come in to save the day (via, car, zeppelin, etc.). It has a great feature where you can watch the last 5-10 seconds of where you screwed up and failed a song, which is a nice addition. Also, some of the songs are better than I expected, with some of the covers being quite reasonable ("Let's Dance", "Highway Star" and "YMCA" come to mind).
What's worse? The stories in general seem very lightweight compared to Ouendan. Although I do admit that as the game progresses, the stories do seem to get better (its counterpart story to Ouendan's dead boyfriend is really depressing). But some of the covers are horrible. "Material Girl" and "Rock This Town" are definitely subpar and weird compared to the original versions. And the clank and clunk sound effects as you tap are definitely more annoying than the symbal crashes and whistle blows of Ouendan (but you get used to it).
And on a side note, the "Agents are go!" reminds me too much of Gatchaman's "Bird go!" (but no one else will care, heh).
I'm looking forward to getting to the harder levels so I can get in more of a speed groove. The excellent gameplay of Ouendan is still there, and you really can't beat the $20 that this goes for if you follow my lead and take advantage of Best Buy's Touch Generations sale this week (my friend gave me $20 for his own copy of this, and I picked up Clubhouse Games for my girlfriend).
-HM