I wouldn't say "good" but good enough. And if you have questions you can reach out to them on WhatsApp and they respond fairly quickly. need to remove the dash trim piece (mine is carbon, but default is typically white with white interior or wood with black interior) and then run a single cable to the area in the passenger footwell. Remove the signal cable from the onboard computer and then plug in the one that comes with the kit. Then plug the original cable into the other end of the Y adaptor. This taps the screen into the canbus directly. No splicing at all. Haven't had any issues with updating my car, etc and I've done 3 updates since installing. We are hijacking this thread though... ;-)Does it come with good instructions? How invasive is it? Did you have to splice wires?