My six year old daughter loves playing this game. The only complaint I have is that I am having a hard time convincing her that she can do more than level one, which goes in numerical order. Level 2 is where it starts mixing up the problems. I am confident we will get there though. I would recommend it. She seems to be getting faster with her math work. The first game that was shipped to us didn't work, but CBD was very quick to send a replacement which works fine.
I purchased this for my 7 yr old grandson's birthday and he loves it! So do both of his brothers (8&5). It's a little confusing going from game mode to calculator but once they got the hang of it they have had hours of fun while learning!