It wasn’t that bad. I tried it 2 ways. First time on the driver side, I did one large sheet from firewall to trunk. It’s a lot harder that way. Passenger side I did multiple sections. You can overlap. Also in tight corners or bends, cut some of it with a razor blade and you have more flexibility.
After a day, it stiffened up and made a noticable difference.
I bought 100 yards of it and only used about 40 so far. I still have to do my doors and trunk area. 