The cans have sufficient space for the cables, have both sides of a cable gland (the possibility of upward or downward introduce is virtually impossible to use with current Cat7 laying cables that are too rigid). The clamping with LSA-cutting tool is fast and reliable, the color coding on the pins make the manual superfluous.
I've already bought several cans of different manufacturers, but I would take for surface mounting repeatedly it here. Flush I have not tried this box, but since the differences are smaller.