Decided to go with 50 mil Kilmat roll after doing extensive research and cost comparisons with other 'well known' brands.
It was a no brainer on paper.

Pros:
- Super easy to work with and extremely pliable. Can easily be cut with household scissors.
- Does not have super sharp foil edges and can be applied with bare hands
- Very well packaged and comes in 50 pre-cut rectangle sheets, which is much easier to manage than a giant roll
- ZERO SCENT/VAPORS
- Decent adhesiveness when applied to a clean surface prepped with isopropyl alcohol

Cons:
- Stuff is a bit thin. However, you get plenty of product so I applied double layers to all panels for essentially 100 mil thickness. I noticed a rather noticeable difference in tone when I knocked on the panels with a single layer vs. double layer Probably worth your efforts to double up the first time.

- the 'square pattern' application guides on the foil were a little bit difficult to press down fully with a regular roller. So I went over them as best I could with a roller, then used the back of the handle of a large flathead screwdriver which really flattened them out and gave me peace of mind

Did 2 layers on both the inner and outer skin of the front doors of my coupe and still have over half of the product leftover.

Stuff is really good and made a noticeable difference in my vehicle with just the doors done. Have not even touched the trunk yet. Rattles were cut down substantially and I can hear much more defined and fuller bass notes from my mids and subs. The front stage just feels a lot tighter and envelops the cabin.

Tip: you do NOT need 100 percent application with these sound deadning tiles. 60-65% coverage on a panel is all you need. More than that and you are just wasting product and adding unnecessary weight.

Would definitely purchase again.

It's much lighter than Dynamat. Having said that, it's much more flexible. There are probably some places that this would be much easier to work with and possibly more effective because it's very flexible.

It's also very gooey. Not to the point where it makes a mess handling it, but it's just not as firm as Dynamat or Eastwood's Xmat. For the money, I'd go with one of the other products. I will keep this around for very complex shapes.

I bought this sound deadening to go into my 97 BMW. It came factory with a great sound system and deadening, but I was bored and wanted a project. It went in very once you remove the interior of the car. I'm very pleased with the result. If you're standing outside my car and I'm blasting music in my car you can barely hear it at all which is awesome

Kilmat is killing it :) I wish they were in stock more often so I didn't need to wait to finish my project.
My current project is my 96 accord. Very happy.
4 stars for not including at least cheap roller :( at least something you can start your project

I have never used sound deadening mats, but I customize my cars A LOT. The price of this product is way lower than the leading brands but the quality is fantastic. I thought I would be getting a lower quality alternative- side by side it looks and feels like the big name brands. You will notice how heavy the stuff is from the box, which wasn't light nor fluffy.

I especially liked the grid system for easy and precise cutting on the foil side. Once I measured and cut, install was a breeze. In fact, I had to re position a few pieces, the glue had no problem adhering even with a couple of times off and on. I did the door panels on my Tesla, which was already pretty quiet. It "seems" quieter but unfortunately that is seat of the pants, not scientific. I didn't take before and after readings. I did put some behind the speaker in my Ram truck and sound DEFINITELY comes out louder than before, with less loss behind the speaker.

50 square feet is more than enough to do a vehicle completely.

The instructions recommend using gloves- I didn't and found no ill effects or reduced adhesion.