I went with fatmat and was very pleased with the product. ~70sq feet did my entire hatch floor pan, and doors (double/triple behind speakers in the door).
It seems to work pretty well, and didn't seem to be much different from dynamat at 1/3 of the price.
2012 SE Hatch - 5 Speed - Tuxedo Black
Engine: K&N Typhoon CAI, Magnaflow 2.25 exhaust 15072
Suspension: MS3 Springs, Focus electric RMM.
Audio: LC6i, Polk Audio db6501 front, db651s rear, db1040DVC sub, Rockford R600-5 Prime, Fatmat