I've liked this stage since the original on N64, though it made a comeback in Smash 4, so its return in Ultimate isn't a huge deal. It's a decent stage with lots of things going on.
Since it started during the series's more simpler times, there aren't many hazards. All you have to worry about is the bumper in the top middle.
And the moving stone platform that moves left and right.
I'm glad to see it back, not my favorite stage, but one of the betters ones in my opinion.