A great game for any rhythm lover that combines a variety of music with well-timed patterns.
My only 3 bones to pick with it is the tendency for your hand to cover the oncoming dots, which isn't much of a problem in the Early difficulty levels. In the later levels however, (actually it's pretty much limited to HARD ROCK! mode) the dots appear much quicker before the time you're supposed to press them than in the other stages, and moving your hand out of the way to see can sometimes cause you to fail quickly. It woulda been a better game if the dots had always moved from top left to bottom right and then back up if you were right handed and vice versa if you were left, to eliminate this problem.
Also, the DS lite has a tendency to register less at the very edges of the screen, which developers of EBA seem keen on using as much as possible. Hitting a note and missing it in the game is as frustrating as anything, plus sometimes your frustration throws your beat off and causes you to fail.
Last, the difficulty on most of the songs in Hard Rock mode is a tad insane. Though, I know it was done so people didn't cycle through the game so quickly, on the last few stages it was a tad over-done. Especially for the male gamers on songs like "Material Girls" where they had to sit through the song several times in agony before passing it.
But none of that is to take away from the fact that this is a rhythm game up there with the sensation of DDR/Stepmania. Do not pass this up because of childish looks. It's a spectacularly well-done game, and if you're like me, you won't be able to put it down until you've gotten A's on all the songs in HARD ROCK! mode.