I agree aswell. I run dynamat extreme, but thats cuz I'm dumb and did no research. I will go with b-quiet next time. It makes huge difference

 

B-Quiet sound deadening material with CCA code during check out = good stuff.

 

There are lots of brands out there and it's the same with car audio everywhere, it's all about opinion. Everyone will have their own opinion and will be loyal to a brand name (or prejudice against one) but it boils down to what you'll think is the best.
I've seen a lot of research on the topic and it's amazing the conclusions.

Basically you're looking for the best adhesion and most mass per square inch. The better it sticks and the heavier it is the better it will dampen.
I saw a demo with a piece of metal that was sprayed with WD40, then, while still wet had some material applied to it and after about 5 seconds of holding it there, it stuck.

I know one of the downsides is also smell (in the summer having your car smell like tar sucks) and temperature resistance (having it heat up and melt and fall off in the summer or freeze and get brittle and fall off).

If you are going to go with a more "cost effective" brand then I would say that surface prep will be your most important goal as well as you will probably want to double or triple layer it to get a better effect.

 

There are (2) ways to dampen a panel! One is mass, the other is adding rigidity. The problem with adding too much mass is the vehicle becomes heavier and often the material becomes quite thick.

A good approach is reasonable mass and a rigid aluminum layer. Then you receive benefits of both methods.

Another very important thing to consider is if the product will remain stuck to the panel it was applied.

Overall Dynamat is a pretty good product, one of the better ones actually. There are a couple better ones out there.

Unfortunately Dynamat Extreme is at the upper end of the price spectrum when compared to its competitors, They have to pay for marketing and Chip Foos's endorsement some how.

 

I have used B-Quiet Ultimate and Second Skin Damplifier pro, the B-Quiet was worth every penny and so was the Damplifier pro, what I noticed with the Damplifier was it was much easier to apply, stuck better, and didn't require as many layers to get the same result, so in the end my Using the Second skin I actually spent about the same as B-Quiet by having to so less layers. The Second Skin stuff is far superior to Dynamat and a fraction of the cost, Dynamat is just to well known that the misinformed pass it on as if it's the best, basically the same way Audiobahn seems to still be around.