Highly tempted to try this out early, but I'll try to wait for the new figures to come out first on Sunday, so I have a giant.
And Blade, you can actually get in preatty cheap on ebay. That's what I did for the first game. Through strategic buying and selling I have the 3ds game, portal (also works on Wii), 15 figures, all 4 bonus levels, and all magical items for around 100$. For the new game, I just need to get some figures and the 3ds version used sometime.
Now gameplay wise - is it the best game ever? No. Is it fun to play and a cool concept with the figures? Yes.