So, I bought Super Mario Maker today (along with a Palutena amiibo \o/) and it's a crap ton of fun. A simple but fluid and dynamic level editor, a wide variety of levels already available. It's almost everything I could ask for in an official Mario level editor (except for the due lack of drills, certain enemies and game mechanics, and slopes).
I've been playing a whole bunch of levels from the 100 Mario Challenge, and my brother and I have been passing the controller between levels like good old times while laughing off at "babby's first level".
Been making a level of my own which I'm planning on uploading when I can. It's a straightforward grassy plains New Super Mario Bros. U level with a few things thrown in here and there. I'll post the level ID for it later, for those interested.

