Utterly horrible looking. I’ve seen a number of prototypes and mockups of 3-D printed houses (typically using concrete blocks), and this one is easily the ugliest.
Beauty is in the eye of the beholder.
This is just the early first steps — the technology has tremendous promise. Among other things, it will likely lead to a lot of innovation in building design. Who knows, you might find some of them attractive.
No one called the 1903 Wright Flyer beautiful, but it laid the groundwork for the airplanes we have today.
Ditto for the 1923 Ford Model T.