I have used fatmat on my GTO and daily driver. Got 4 rolls for around $190 shipped, and did both vehicles with much less than two rolls. One word of caution, though, this stuff is PERMANENT. I've had to cut the floor for my TKO600 installation and the fatmat made it a very messy job. And when I finally get to install my tunnel patch (someday!), I'm sure I'm in for more of a mess. Also had driver's window come off of the track last year and the fatmat made working on it quite difficult. I now have a nice rattle in my daily driver's door when the window is down and I haven't looked into it because of the hassle of the fatmat.
I'd still recommend installing it, but if I had it to do over again, I'd probably do a little better planning in those areas that may require work.
__________________
Matt
1962 Grand Prix - Cameo Ivory|389 4sp|One-Owner Survivor
1964 GTO HT - Silvermist Grey|389 3x2s 4spd|A/C|Hurst Wheels|Frame-off|SOLD
1965 GTO Post - Mayfair Maize|421 3x2s TKO600|Pro-Touring|
1966 GTO HT - Barrier Blue|389 3x2s 4spd|Red Fenderliners
2005 GTO Coupe - Yellow Jacket|Magnacharged LS2 6sp|543hp/561tq|SOLD
2006 GTO Coupe - Spice Red|LS2 6sp|20k orig miles
|