I just got one this week off of Wal-Mart clearance for $40! My best advice on this one would be to read the reviews on Amazon - they are pretty spot on. While I think this toy is ok for $40, I would be totally disgusted for $80 or more regular price. On a side note - I got this for my 2 year old. He's an art nut, and writes on every surface in the house. I thought if I could just channel that energy........ My six year old son thought it was cool for about 20 minutes - now he's done with it.
Pros:
The magnets are fun
Everything is easy to use
Lots of expansion packs
Cons:
It isn't as interactive as it looks like it would be
Plastic
Wet erase pens (I could have sworn it said dry erase on the box)