Orange Virus Tuning - Is it real?

I was searching up tuning for the corolla and came across this website. Apparently they offer tuning for the corolla for about $600. Has anyone tried it and are the results real? I am a bit skeptical seeing as it apparently "flashes" the ECU through the OBDII port. From what I know, ECUs cannot be modified from the OBDII port or am I misinformed?