What Home Depot insulation have you used under your carpet?

Have you had yours on the road yet? I'm now a little concerned about actual sound deadening capabilities of this stuff.
I only did the headliner area and the floor back to the rear seat. Really dont know if it makes a difference to be honest. No a/c, windows are down most the time, loud exhaust and if the windows are up there is wind noise no matter how many hours spent adjusting window gaps and door seals etc..
If you did your roof and the headliner isnt in yet make sure it is glued good. Mine sat a bit before I had the headliner installed and it wouldn't stay up. Would have been laying on the headliner and bows... Ended up having they guy that did my vinyl top and headliner use whatever glue they use and its been fine for 3 years now.