Things I'm not particularly happy with are the mesh ceiling has a fair amount of flex and doesnt feel solid. The mesh bottom panel is difficult to remove and clean when compared to the filters on a Meshify C for example which just slides out from the front. Yo have to lift the case up to access it to remove, clean and reinstall it.
I'm using 2 x Artic P12's at that the top, they seem to resonate at certain RPM. 2 x Noctua NF-A12x15 at the bottom, they are buzzy over 1000rpm but I think thats the fans not the case.
Its good in terms of temps for a small case though, compatibility is an issue but it wouldn't be small if it was compatible with everything. It clearly scratches really easily on the front panel as mine arrived scratched and thats really taken the edge off for me. The power button feels a bit cheap and has a bit of wobble to it too.
It is a good case dont get me wrong, it just could have done with being a little more expensive and slightly more sturdy and just a couple of MM wider. I think a lot of manufacturers will look at the success of this and the H1 and respond with their own ITX cases, hopefully Fractal Design do something interesting but for now I'm not in a hurry to move on but will do when the right case comes available.