I will say that I do LOVE this machine, but I also greatly dislike it's engineering pitfalls.

This machine claims it can grind chickpeas, which is why I bought it. And yet even when you pour them very slowly (3-5 at a time) into the hopper, or less slowly 10-15 at a time, it clogs. It stops grinding the chickpeas, they accumulate in the hopper, and if you're lucky you can get the clog to move through by switching how fine the powder should be, but this doesn't always work. Instead you have to turn the entire machine upside down, beating on the bottom until all the beans fall out, and then re-start it before adding beans back in (sometimes the clog still isn't cleared when re-starting).

Now on Lentils, Rice, Wheat, etc.... this machine is amazing. If it were only advertised for those purposes I'd give it 4 stars only because of the engineering pitfalls. There should be a way to disassemble this machine to clean it when clogs occur, but that wasn't considered by whoever designed it. So one day when this machine has it's final clog I'll be out $200 - until then I'll keep making flour (just not out of chickpeas).

Overall I really like the WonderMill grain grinder.

Pros are: 1) My counters stay pretty well clean of flour while it's running. 2) It's easy to take apart and assemble for cleaning and emptying. 3) It's loud, but not unbearable for my sensitive ears, and it grinds pretty fast. 4) I like that it comes apart, although I haven't stored it in pieces because there is always leftover flour that can't be cleaned out and I'm concerned it would attract bugs.

The main cons are: 1) The grinder tends to spit out a few grain kernels while running, so I have to be prepared for that. 2) The flour and container are warm after running, so I'm concerned if the heat is damaging the flour. 3) It's impossible to clean the flour out of the hopper so you end up with a small amount of old rancid flour mixed with your fresh. 4) The pastry setting could be a finer grind. 5) When you take the container apart to retrieve the flour, you will end up flour on your counter. 5) It's easy to forget the filter is on the canister lid when I'm washing it.

As suggested, we ran a 1 kg. bag of white rice through the machine to ensure nothing inedible would wind up in future millings. The settings for the mill are, "Fine, Medium, Coarse", which is rather ambiguous in my humble opinion. Because this refers more to the size of the grain you're wanting to reduce to powder, rather than the resulting particle size of the flour. If you set it on Fine when trying to grind Corn, the kernels would never be able to get to the blades!

The rice grain ground very well on "Medium", though it probably would have worked and produced a finer flour on the "Fine" setting with no problems. We'll try that next time. If the blades don't open sufficiently, the process would bog down; which is not desirable. It went very smoothly on Med. however. There was a pleasant aroma from the machine as I slowly dolled out the Rice grain from the bag into the hopper. In the future, I shall make sure the Rice has no rocks in it! Some of the Rice grains were popping out of the hopper because they are small and less weighty than say Corn. Not many spun out, just a few! Then flour dust began to form everywhere, indicating a leak of some sort. Too late, we had to get the first grind done!

We then disengaged the canister from the mother-ship, and felt the warm Rice flour. It smelled so good! For a Med. grind, it looked very good! But like I say, rice would likely do even better on the Fine setting due to the size of the grain. We fed the Rice flour to the wild birds.

I discovered that the "cross-over-tube between the WonderMill, and the Receiver-storage container wasn't seated properly into the rubber gasket. Hence the Rice powder snow everywhere on the table, floor, etc!

We cleaned everything up with a pastry brush and prepared to do another grind of Corn. This time, ensuring the proper mating of the crossover tube to the WonderMill.

Our son is an avid gardener, who has produced a number of his own cultivars from crossings of field corn from around the Americas. So we took a single Cup of his beautiful, colorful, Corn kernels and fed them slowly into the hopper on the "Coarse" setting. The results were amazing! Please compare the pix to what a Coffee Grinder does vs. this WonderMill Grain Mill. The single cup of Corn grain produced about 400 mL of what I'd call, Fine Corn Flour. We're having Corn Bread for lunch!

I love this grinder. It's a high capacity grinder so it's fast. The wheat is very fine even on the break instead of the pastry setting.

My white wheat looks as close to all purpose flour as anything else I've ever used. I've been able to switch out a healthier wheat flour without my kids hardly noticing.

I put in about 8 cups of wheat at a time. I make bread with 12 cups and there is a little bit left in the canister.

I grind other grains in a Nutrimill Harvest because you can clean it better between grain changes. When I grind wheat in my harvest it is coarser and so slow. A whole different machine.

I love both for their strengths but if you need volume, go high capacity!

wow, did the dry run of two cups of wheat to clean it, was going to time it, but by the time I could look at my watch 2/3 was gone., later ran some hard red wheat,,,, tip I saw in the vid's I saw, to keep heat of the flour down, I bagged some hard wheat in gallon zip bags for a few hours in the freezer , this way ground wheat flour is cool to the touch when you grind it.
used a electric one that I had borrowed from a friend (plus a hand grinder No way) any way that other brand and I have no idea what brand was like a jet air plane and was slow and a container was put in front of it so flour in the air
not this one, 100 times better, considered the nutria mill but I thought this one was a little better .
by the way this has a copper wound motor, doesn't even warm up using 12 or so cups thru it, they ran a thousand pounds thru one in 10 hours straight, 100 pounds a hour , I don't know about but a 1000 pounds I do believe that 100 pounds a hour , this thing is fast and not noisy while grinding at all, don't even think about using a blender, , slow as crap one cup at a time and gritty, Been there , waste of time and messy