Did you use the 80mil? Picked up some Nico black 80mil for the doors, rear floors and rear seat, along hatch/spare area. Be curious to hear your opinion on ease of install and effect.
For me it was mainly to help end door/speaker rattle and help with the sound quality/bang for my buck with the helix install. My understanding is it doesn't help too much with road noise. If you're looking for that, maybe search around for a few of the aero panel threads. I hear they make a decent difference in road noise.
So yesterday I just did driver front, which took several hours - most of it spent tracing out templates and cutting the mats. I did as much of the outer door shell as I could reach through the hole, and then covered about 70% of the inner panel in one layer of mat and a layer of foam over it. I also took out the window switches and lined the contact surfaces with tessa tape.
Result so far - driver door is now free of all the little creaks, rattles and vibey noises that pop up in that weird zone of vibration that happens at around 3000 rpm, especially when lifting off the throttle, and from driving over uneven surfaces, such asphalt chip seal roads. However, now I hear the passenger side much more clearly, which makes sense. So, that side will be next.