It was installed in a 30-year-old car along with similar products from the same company. With 6 sheets, it transformed the whole car.
The adhesive is excellent.

Very strong glue and easy installation. Its price is reasonable in relation to the quality. However, be careful because once it sticks, it is almost impossible to remove it for any reason.

Purchased for application in the boat cabin on the only fiberglass wall. It stopped the moisture that appeared due to the temperature difference on the interior wall compared to the exterior. It has a nice texture and is resistant to abrasion. Bonus, although it wasn't the main goal, it also soundproofed the bow of the boat.

Very good product with good adhesion.
I covered the panels of the car doors after first installing sound-absorbing panels of 4mm internally in the doors (on the metal).
The micro-vibrations in some areas of the panels were also reduced, resulting in better sound quality.
You can perceive the difference, but don't expect dramatic results.
It definitely does the job it is intended for, and I recommend it.

It does not have a strong adhesive base. It does not cut easily with scissors. It also tends to "rub off" at the cutting points.
It is probably a general-purpose insulator. I do not have an opinion on sound insulation yet. Overall, my impressions are rather mediocre.