I have two pairs of their carpenter jeans with the fire hose material around the waist and cuffs, and in the pockets. I've only had them since Christmas, but they are quality jeans, feel much heavier than your usual store bought stuff. They're sizing is pretty close to actual.
I also have a few of their pocket tshirts for work, again, they are heavier than the hanes or fruit of the loom stuff.
and finally, I have one of their insulated flannel shirts. I love that thing and wear it all the time. It two was bought for me for Christmas and I believe it is a tall man, so its plenty long for me (6'5") and I like the fact that it has snaps instead of buttons. Heavy duty snaps at that.
over all, they are very compatible to carhartt in both price and quality. I don't think their fire hose matrial is as heavy duty has carhartts canvas style matrial.