Summary: I mistakenly got this game after reading reviews for the original (which I won't buy after playing this one). The games are boring and really not much of a challenge. If you do get it, make sure to "redo" your dominant hand scores right away.
Summary: I am a natural leftie and was always told as a kid that I was ambidextrous. Well, I found out that I am. I can say that my right hand gets really sore after using it so much trying to match my left. But it's a fun game.
Summary: I thought I was ambidextrous since I can write, do various tasks and play games with either hand. This is a very good at improved your abilities in the non-dominant hand. It works well for hand and eye coordination. There are multiple levels graphical representations of your progress.
Summary: My 6YO son always tries to play my DS games (Brain Age types) and can't do it. Left Brain/Right Brain is simple enough that he can actually enjoy without frustration. At a good price (I bought used for 12.99), it's worth it for that alone.