The Vertical Power unit eliminates buses, circuit brakers, fuses etc. that have traditionally been a necessary part of aircraft electrical systems. Vertical Power calls it an "Electronic First Officer". They give a much better explantion. Here is the link:http://www.verticalpower.com/
The Vertical Power simplifies the wireing during the installation because it is the junction point for all inputs and outputs of the flight instruments, engine instruments and navigation instruments using RS 232 or ARINC 429 wires that plug in-to the various units. It is then like an on-board computer that can be programmed (preferrably on the ground) to operate systems needed for various phases of the flight.
I'm VFR in the LEZ. I wanted IFR capability mainly for emergency sitiuations:( , but will not be full IFR (I only have 1 display. Full IFR would require 2 displays and 2 comm radios). I will have 2 GPS. (1 in the EFIS and another in the 430.) I will have 2 independent attitude sources (1 in the EFIS and another in the A/P). The A/P can be operated by me as a stand-alone or controlled by EFIS programming. Should I loose the EFIS during IFR (which I don't plan on being in except in an emergency), the A/P could still fly it to VFR. These contingencies can be programmed into the VP before flight so it truly functions like a First Officer when these situations arise.