1) not for chopping.
2) If it takes you more than 2-3 minutes of cutting someone up to defend yourself, you're doing it wrong.
3) try testing it on a target that it was intended for, like bamboo mats or a side of beef and see how it works. Unlike a machete, it's not designed for chopping wood (see 1).
4) Even on this sword, the edge shouldn't roll. Either you did something weird to it (like chopping at a tree) or you got a bad one.
1) Very true.
2) Assuming said person is unarmed with only thin clothing, then yes.
3) Don't have bamboo mats, and I'm not sure anyone not doing kendo with a live blade would have those.
4) it's true I struck a tree with it, but a papaya tree is a far cry from the hardwood tree you're thinking of.
This is the said tree, after I cut it with my Umnumzaan for about 5 minutes:
My umnumzaan could still shave afterwards, and my Kris cutlery katana could also still slice paper after striking it. It's pretty fibrous and hollow inside, pretty similar to bamboo really, though not quite as tough(could stick both my sword and my Umnumzaan through it with little effort).
Again, I'm not entirely sure if the edge was rolled or if I'm looking at a burr, though I finished with a 3 micron belt on the edge, so I sincerely doubt I left a burr.
I'm also thinking that human bone isn't that far off in toughness compared to that tree.
Still, I suppose I can't expect top notch heat treatment for such a large blade for $120. I just feel this insane urge to buy a Junglas and use it to cut my wakizashi in two

.