Sound Deadener...?

[Pyrorocketeer]

I am almost at the point where I can start putting down sound dampner, and while I was searching online for a good product, I came across these spray on sound deadeners that would work great for my car. My only problem is if this stuff works as good as the sheets that you lay down. So has anyone used any spray on sound deadener like "lizard skin" or "eDead v3"?
Does this stuff work as well as the sheets, or not?

Thanks,
Chris Rhine