I bought aware of this case, because I find it very visually discreet, thus appealing, and because the matching heat sinks are supplied directly for Pi.
The installation of the Raspberrys went as expected quickly and easily by hand: Open housing, to clip Pi - done!
The heatsinks are coated with double-sided adhesive, making it particularly easy to install: simply slide off and even this step is checked off!
Finally, the lid on it and that's it.
All connections are easily accessible - it is not embedded in the housing too deeply, but it also looks out nothing.
The Pi disappears with discreet black casing invisible in the sideboard on the receiver.
The heatsink fulfill their purpose adequately. All temperature readings are in the normal range. Even after overclocking the Pis.
As a single point of criticism I would like to argue that the case can be opened only with a little practice and intuition.
The two clips to be pressed simultaneously is not so easy, but with some equipment of course feasible.
Not a big deal, since I rarely take my Pi anyway out of the housing.
All in all a good body with good heat sink, which I would buy at any time again!