Very practical to use...
Switching between the 4 systems is very easy. The fact that there are 3 usb inputs is a big plus, to share devices intelligently.
The main advantage is that the 5 HDMI cables supplied also have USB connectivity to limit cables.
The only thing that doesn''t make the maximum mark is that sometimes when switching, the synchro is not done well, and you have to do a complete turn.