I've had my Great Northern popper for a little over a year now, and I'm glad I made the purchase. It certainly makes it rather difficult to go back to microwave popcorn, that's for sure.
I recently purchased a 50lb. bag of GN popcorn, so I can now officially say that I have popcorn "up the wahzoo". I put it in a 5 gal. resealable bucket, but I still had close to 10lb. left, which I put in some smaller containers.
The only gripe that I have is with adding the coconut oil. I have a gallon jug of the stuff, and while in the summertime it's easy to scoop out, this time of year it becomes something of a challenge, especially as I'm getting much lower into the container. I think, however, I've come up with something of a solution that has been working out great, and cuts down on the prep time. My wife has some mini muffin tins that are non-stick, so what I did was scoop some of the coconut oil into a measuring cup, stick it in the microwave to melt it into liquid, and then pour it into the mold. I then place it into the fridge for about 15 minutes to harden up a bit, then remove it and place it in the freezer for another 15-20 minutes. When I take the tin out, now I have 24 nice little coconut oil pucks, that will pop out rather easily. I put two of them together (which is just the right amount of oil for the popper), wrap 'em up in some plastic wrap, and then put them all in a resealable plastic bag, and put them in my minifridge. Now when I make a batch of popcorn, I take out a pair and easily drop them in the kettle, and the popcorn and Flavacol, and we're good to go.