Seems well built, assembly might have been a bit easier if the photo's on the instructions had been taken in a room with light....and must have not been proof-read, I spent several minutes trying to determine what "hock" meant, then realized it s/b "hook". Otherwise use it to take my canoe from the garage to the lake...a heck of a lot easier than putting it on my shoulders...and I can put all my stuff in it. I would have given it 5 stars if the instructions had been better.
I bought the aluminum one about 3 weeks ago to use it for hauling my duck skiff and some decoys. Not that much weight. Just about got to I where I was going and the "axel" snapped. I used it to go down a regular walking path through the woods/fields to a pond. It wasn't a very rough path. Unless you are only going to use this on paved trails stay away from this. Not well constructed for durability.
I took two of the alum. carriers to Bowron Lakes in BC. Both alum. carriers failed during the 2nd portage. (Failed means one axle broke the other axle bent.) Only 6 1/2 more portages to go. They are rated for up to 200 lbs. My kayaks plus gear weighed in at 90 lbs. I think they might work if you were hauling 35 lbs.