Mine is great. Zero rfi issues. I'd prefer a separate ecu type system in the future but it's been a good system. Gotta really treat it like a new toyota. Very sensitive to voltage, grounds, battery amperage, etc. New wiring throughout the car. Quality connections & splices. Etc. Not saying they're not having issues otherwise but many, many units are out there performing. My remote tuner is tuning probably 4-5 a day, every day it seems. Definitely not a system where you just replace the carb and use a bunch blue butt connectors and roll.