I can't fucking believe how much Tetris they shoved into this thing, it's genuinely insane. That's the best way I can put it, it's got the most Tetris out of any Tetris game I've seen. If you want variety, play this one.
It's a good tetris, but the presentation is mid and the pieces are too small for the DS screen. Since there's Tetris DS on the console already, you should just stick to that version which is way better.