It does what it was designed for, it impresses litte kids like my five year old. She thinks it's cute, makes her giggle & most certainly influences her to turn over her money to Apple when she gets older.
Me?
Oh please it's a "Golly Gee Whiz" time waster.
I use LaunchPad instead of Mission Control.
I don't see how one is related to the other.
I deleted my applications folder from my dock and instead of that i use lunch pad, anyway, mac os x was known as simply comfortable os, now it isn't simply, a lot of features with a lot of animations it makes a little bit ... strange, full screen apps the only thing which keeps me on os x lion.
And I just don't see the point in blurring the desktop wallpaper when all of the icons have shadows like iOS.
I don't know why people even dislike it, why is it so bad? It's too simple to hateit does what it says "on the box" i.e. launches apps/organises apps.