My 3 yr old has this one and Umizoomi - he has not touched Umizoomi since he got this one - loves it! Some of the 'gaming skills' required have taken him a bit to learn, but now he's off and running.
My 4 year-old daughter and 7 year-old son love these games.
My daughter likes them all. My son's favorite is where he has to pay for things. I have also played the games to see what they were like. I definitely think it is worth the money.