I have that flex-o-ladder. thing weighs about 95 pounds.
I have a Sam's Club Little Giant knock-off. It does perform as advertised, and is more stable than other ladders. It does indeed replace most ladders, and can do everything they say it does.
I don't know what it weighs, but it's more than it needs to weigh... The shape of it also makes it a royal pain in the ass to move around. I'm a very strong guy, and I find
myself cursing when I have to move it from one room to another. There's just no place to grab it that's not going to bug you in some way.
Remember those wonderful garden carts Sears used to sell? They were quite square, tall, and would hold a lot of stuff. I don't remember exactly which, but they were made of glass-reinforced polymer, and sold in black initially. The wheels were in the front.
Seemed great, until you got one home. Whenever pushing it on anything this side of a perfectly leveled driveway, your shins banged into the back wall. You had to lean into it as if it were full of molten lead to avoid buggering your legs.
They were, as a result, entirely too frustrating to use, and the only reason anyone kept them is because they couldn't get rid of the things.
The ladder is very much like that. I suspect the genuine article is more appropriately built.
Cheers,
Kennith