Amazing
This game is just incredible, amazing graphics, addicting game play, DJ MAX has it all.

Black Square, is defiantly a challenge. It basically is the older brother of DJ MAX Clazziquai, providing loads of bug fixes, new songs, and the most challenging songs yet.

This game is great for the DJ MAX veterans, or if your new the the series, this is a great title too. Once you pick it up, you probablly wont be able to put it down for awhile.

solid game
this game is great for any kind of pick-up-and-play action. However, you need to find a patch to be able to play in 6 button mode with more than 2 songs, and it exists, but to get it legitimately, you need to register the game with the code it comes with and have a korean social security number >.> You can find the patch around the internet though, which is good for us americans. However, I would not buy this game right now, as you can now purchase a bundle of black square AND Clazziquai edition for $45 on play-asia. That extra $5 will get you a normally $40 game ;p

The cream of the crop
I have dj max portable to, fever and now, Black box, and I must say, this version is the best so far, with better video along with new songs and good game play, I'll give this game 5 stars cuz its just so much better than the others

A great, albeit imperfect addition to the DJ Max PSP series
DJ Max Black Square continues what was first established in Portable 2 and adds some new unique touches. The elimination of the leveling system and basing most unlocks on the number of songs makes unlocks simpler in this release. The songlist is a combination of songs from DJ Max Online and new songs. (Of note being Son of Sun by Shinji Hosoe, also known for his work in various Namco games and Beatmania IIDX under the alias Sampling Masters Mega.)

The only major downside is that the release has some glitches (of note being the 6b mode glitch which shows only 3 songs), but obtaining the Platinum Crew patch for the release is not too difficult.

An enforcement of Clazziquai
As many of you may know, there's various bugs found in the Clazziquai Edition of DMP. So Pentavision has delayed the release of Black Square. Because I was so disappointed in Clazziquai, I did not buy Black Square untill I finally determined to get the Quattra Limited Edition. (It was out of stock on play-asia of course, so I got it from another website) And there was no UMD in it. So I ordered this one from Play-asia.
I must admit that this one is much better than the Clazziquai version, and it's the real DMP3, if you want to call it that way. The control has a whole different type of feeling, which is not a bad thing, and the music all got into a higher quality, compared to old DJMAX songs, which is mostly techno, dance and rapping, now they have girls humming and choros and some cool dj scratching sounds.