I wasn't expecting much when I decided to try out this show, but it's really good. You can tell how good it's going to be half way through the opening song. The colors and animation are really bubbly and happy-go-lucky with the main girl being one of the cutest I've seen in any show. The comedy is great. A lot of the humor comes from the the eccentric side characters that live at the Astro Lodge, each one having a simple yet distinct personality and there's a good deal of care in how they all interact with each other. These side characters remind me a littleof Yokai side characters in Natsume's Book of Friends, except quirkier.
The story starts out fairly straightforward with a great premise. There are a few back-stories revealed and some twists here and there. The side characters all have their own small arcs as the show progresses that gives them more depth and makes everyone
at the Astro Lodge feel like a big weird family. The story wraps up very nicely at the end, but I'm really hoping for a second season to spend more time with these characters

I haven't read/seen Mason Ikkoku but the premise of this show seems to be a parody
of that but still done with warmth. I fullheartedly recommend this for anyone who could enjoy a silly romance comedy with a dash of slices of life and sci-fi adventure.