I'm bumping an old beatmap here, I realize, but especially with the request for people to post feedback, I think this one deserves some comments.
Of all the beatmaps I've downloaded and tried thus far (which to be sure isn't all of them), this is by far my favorite still. It's on a very playable level - I think the beatmaps overall skew very hard here, to be honest, because logically most of the people here are going to be avid Ouendan/EBA fans, and therefore used to more hectic paces since they've run through the game, gone through S-rank/all-300 runs (the latter being far beyond me), etc. This one is very playable, though - easy enough for beginners to cut their teeth on okay, although parts will definitely trip them up, and keeps you moving enough for more skilled players to still have fun if they come back - although I do have to admit, it is fairly easy on that level.
More to the point, though, the layout is very well done. Interesting enough things are done with the sliders and all, and while it took me a few runs to realize what it was, I'm very impressed with the recurring bit that matches the little hand gesture Ken Hirai does in the music video - just two beats far apart but chronologically close and a slider in the middle, forcing the cursor to move in the same way. Overall, though, what's striking is that every bit that might mess somebody up is almost purely because they're failing to match the beat or move fast enough - beats are placed in natural ways for the pattern they follow, and no dirty tricks are played like I've seen on some of these, like maps where the beat is alright to match but the sole difficulty is the beats are placed randomly and very far apart, and it's hard to get your mouse there.
So I guess in summary this is the most "fun" beatmap I've seen yet, and therefore the one I've gone back over the most, even if it's not the most challenging. Good job!