I feel like I kind of missed the boat on this one. On one hand, I think I can see why everyone likes it so much, on the other hand I just don't get it.
Although on the whole I liked the fast pace, I kind of wish that it was stretched out to be 7 or 8 episodes instead so I could try to decipher what was going on. It left me somewhat confused.
I thought it was pretty creative in terms of the art. There were a few scenes where they used a manga style to present them which was interesting to watch. The animation was good as well and kept me entertained.
Overall, I didn't really hate it, but I didn't particularly like it either. Sorry if that makes me sound wishy-washy. I would still recommend watching it so you can decide for yourself. Being only 6 episodes, it's not much of a chore, but I also would recommend watching it more than once to get a better feel for it. Give it a shot.