Well, I'm sold. I picked this game up a bit ago and popped it in today... and it's fun as bloody hell, it really is. It's hilarious in all the right ways, ridiculous in all the right ways, and while I already did manage to confirm at last OWmeet that yes, it can actually be good fun with a group... apparently it's also good fun by yourself. There's just so much to do and unlock, which extends games like this in crazy ways, that you could play this for ages. And the characters all look and move fantastically... it's a joy to execute a crazy move into a group of other dudes, then pause and swing the camera around. It's a shame the game's resolution isn't higher, as there are a lot of jaggies happening, but it's still pretty amazing to see some of the details. Samus in particular is ridiculously detailed in the zero suit, more than I was ever able to appreciate just mashing buttons at a friend's house. It's a pretty beefy piece of work.
So I guess I'm officially a Smash convert. All hail Nintendo.