I'm really keen to try it, but the DRM puts me off, and I'm afraid that it's not so much a game but just four or five minigames that allow you to play around with whatever you made in the editor.
Haven't put it on my own computer, but bought two copies
for the boys(8 & 10) to put on their laptops. Pretty cool game it seems. Weird to see what creatures they make that you could never think of. One of them had 2 heads, wouldn't even think of doing that myself...hehe
Edit: All they had were the Galactic Editions. Bit pricier, but comes with a cool book of art and a "Making of..." DVD among other things. And a neat plastic case.