I've got one. It's the not brightest lantern in the world (my dual-mantle white gas Coleman is
), but we used it up in a cabin up at Baxter this past winter and it did a very decent job of lighting up its side of the room.
It puts off a good deal of heat, and a wooshing sound, but if you've got a canister stove this is a fine, not-overly-heavy and more importantly, not-fragile, addition.
For me it's a bit of an oxymoron because when I'd want a lantern most is in the winter when the nights are early , but in the winter is when I want my reliable white gas stove, not my canister one.
The drawback is that without a mantle, globe, or diffuser, it's a very concentrated point of light. If it's in your field of vision, that can be bright enough to make the surroundings seem darker than they are. It also didn't seem to throw a lot of light outdoors. But as an indoors ambient light source, it did well.
Was it worth the money? Tough answer. I think if you really want good light, get a more traditional canister lantern. If you want the tiny size and convenience, get the Liberty.