My issue was how do you fill it, because the top is obviously not large enough for our regular LP filler where I work. Youtube'd it up, and there's an adapter kit that has to be purchased, looks like around $30. You hook up that adapter kit to a larger propane bottle to transfer/fill.
I like to camp out at my lease, so I always have a 20lb lp tank there, use it for a blackstone grille. I use the Mr. Buddy heater also, usually to heat up my tent, sometimes to heat up my blind, and that thing will go thru a 1lb bottle pretty damn quick.
Doing the math...We sell LP refill here at $5/lb, our cost is around $2.90/lb. 1 bottle of non-refillable LP is around $5 apiece at walmart. Refillable cylinders run about $19 each. The adapter to fill is around $30. I can do the math a number of ways, but it seems the savings is pretty minimal.
I can appreciate the convenience of being able to refill 1 or 2 bottles instead of packing around a 4 pack like i usually do, and, don't have to throw away the containers.