Works as intended, very solid metal case, thick plastic sockets. The sockets are Type F: they are grounded but without a ground prong. The ground is clamped on both ends of the connector.
I haven't quite seen this by the pictures alone but the distributor is an entire 5.5cm tall from the ground to where the socket starts. Regular power extenders are 2cm from ground to socket base.
Luckily this was fine for my use case but make sure to measure, especially that the socket covers occupy additional space.
In case you were wondering, the sockets are indeed square but the internal wiring is cut to length so you cannot rotate them. Even if you could, there is not enough space for the socket cover holder when rotated.