I have an lmf II, got it about a year ago i suppose. My favorite thing about is that it didn't cost me too much, so i'm not afraid to use it like it was intended to be used. I spend most of my time outside ( i work in the white mountains of NH as a biologist, and most of my off time is spent hiking/fishing, etc.) I carried it alot when i first got it because i was excited about it, but now that the novelty has worn off i am starting to admit to myself that it probably isnt worth hauling that much weight since there have been very few times that i really needed that much knife.
The edge that it came with was ok, but after a couple months i re-did the grind on it and spent some time putting a nice edge on it, and it has held it pretty well since. I've used it to cut alot of food up for meals, many ropes, sticks, standard stuff like that and it has always cut well. It makes an excellent chopping tool due to the heft in the blade; ive even split small logs with it for fire wood.
The butt of the knife is also a useful tool when you're on your own; i wouldn't recommend using it like the hammer the way it's advertised, because when you do that you smash the blade against the inside of the sheath, but you can hold it in your hand with the blade up and generate a good deal of force with a downward blow, and the knife is rugged enough to take it
The sheath holds the knife very securely. I've worn it every way i could think of, and i usually keep it upsidedown at my side (sort of like a shoulder holster for a pistol)
Given how big and thick the blade is,it isn't my first choice for delicate jobs like skinning animals or working out splinters, but it is a tool in the true sense of the word, and i can think of a couple times that it made my time outside much easier/more enjoyable.
I would recommend getting one; it doesn't cost much and you'll find uses for it, but do have a smaller, sharp knife with you as well for finesse jobs