I did not expect a merch-for-a-popular-album to be this good. Not only the cardboard is of good quality but it also it clicks really well.
There's a lot of unusually shaped pieces (there are triangles, there are curvy ones, some of the pieces have both knob and socket on the same side, etc.) which is incredibly nice to find and combine. There is even one Saturn-shaped piece (that doesn't have any knobs or sockets at all).
The grid sometimes goes curvy instead of just vertical + horizontal, making it even more fascinating to assemble.
I had a great fun assembling it.