To give you an idea of how inaccurate the factory ones are, my factory sensors will read 10 flat and my innovative will read 11.2-.4
This is what I run
All 3 gauges pull info right from the ECU through the OBD2 port, with the option to hook up external sensors such as boost, and afr. As I said, I run the LC-1 from innovative because it has a 5v output and has the option to work directly with Uprev which was a huge feature for me. If the blitz unit accepts 5v signals for sensors, I would recommend this unit.