The fact that it is pre wired is very nice, however, the way it is set up out of the box it is not able to be used with a fuse panel. How it is set up is favourable if you were to use simple in-line fuses to each device.
To use it with a fuse panel you basically have to get rid of the whole line of red jumper wires and replace that with power coming from the fuse panel to the switch you want. You then would use the open blade (one that is open out of the box) to bring power to your device.
Overall I would recommend this product I just wish this was stated because it was kind of confusing at first until I was able to figure it out.