I loved this game, even did it first time through catching all the critters and eating them. Once the Maw gets big enough he can eat the snails whole too, so that was fun.
Maybe it was a bit repetitive, but the game was so cool looking I never really noticed. Little things, like how the Maw reacts to the things that scare him, and the interaction between him and frank, just really made me enjoy this game. Plus the soundtrack was great, the cut-scenes worked well, and the gameplay was very enjoyable.
The game was a bit on the short side, but I think because it was short the elements of it never annoyed me or got really old. Course, I still want me some more content for it!
Plus, the developers are cool, got to talk with one of them at PAX (and even got a cool Maw t-shirt) and how much they enjoyed their own game really was a selling point for me.
So, anywho, if you have an xbox you need to get this game! Unless, you know, yur a 15 year old boy who is afraid people will make fun of him for liking a cute game.. in which case stick to your bloody FPS stuff.
Edit: Oh yeah, and take a look at the website. They have a bunch of background info on the critters, and why they are being imprisoned and so on.