I have three LK rifles. The LK is a pre Big Horn style rifle from Knight. All of them are great shooters. The only reason I don't own a Big Horn is I don't need one having three just like it. But I want to say, this plunger type rifle is very dependable. If something is wrong, you can normally fix it on the spot. But I have shot countless rounds from my LK's and they just don't jam, and they go off.
Now granted you can't use the new whiz bang powder out there called BlackHorn 209. Ok fine. Use Triple Seven. These are meat and potato rifles meant for hunting. They are easy to carry, easy to care for and just a real work horse.
As for cleaning them... break opens are nice without question. But I do not find the plunger type all that hard to clean and maintain.