A little metal piece broke the first time we used it. It's one of the three pieces that you set the stone on. It broke in half and half fell out. I contacted the seller and all I got back was an email saying to contact the manufacturer. No phone number or email. Of course I looked it up online but how useless. Still waiting on the manufacturer to contact me but it looks like the warranty involves having to ship the thing back at my expense and it's super heavy metal so will probably cost a lot. Very disappointing on all fronts and now I have a huge bag or hard red wheat berries that I can't grind.

After researching several grain mills, I purchased this one because of all the positive reviews. I found it easy to set up, despite the fact that you get no instructions, and very well-built. Installing the stones is tricky and almost takes 3 hands to do it. At first I couldn't figure out why the 2nd stone would not fit on the "notch, until I saw that the shaft was moving back each time. So, using my elbow to hold the shaft forward, and hands to install the stones, I got the screw on. Once you have this trick down, it's easy. It is easy to turn unless you don't use fresh grains- then you will struggle and the thing won't stay clamped to the table. I won't make that mistake again. I do have some fresh wheat berries and these are a breeze to mill with this thing. I have also tried the nut butter. Not so good. I had some fresh sunflower seeds, but I have had no luck making the nut butter. It takes forever, and I barely end up with 3 TBS of it. Gave up. Hopefully, I will learn more tricks to using this and be able to make the nut butter.

This is a very cool and compact mill. The stone burr allows you to be sure you're getting actual stone-ground flour (as opposed to the so-called stone ground you get pre-packaged). It's a bit of a nuisance that there is no accurate way to adjust the grinding detail - basically you screw the burr on looser or tighter depending on what you want. But experience makes that a non-issue after a while. Also, getting the openings to line up just right takes some doing - some markings on the edge would have been helpful.

The one BIG warning for those expecting to use this without the (optional) drill attachment and a drill is that manual fine-grinding of grain is not only very labor-intensive (I break a sweat pretty quickly when I use it), but will put huge demands on whatever you've attached this to. Since there's a good chance that's a table, it better be a sturdy one; and even then, it may not be after a few sessions using this with it.

This said, if you're very concerned, you can just spring for the (extra) drill attachment and a hand-drill. Me, I like that manual feel.

Also, forget any idea of buying this without the full basic kit (unless perhaps you're thinking of actually screwing the mill to a surface, one option). You need the clamp and if you don't get it included, you'll end up buying it later.

I should point out I only use this for grain (I'm a bread historian) so I can't speak to using nuts, etc or how well it cleans out between different products. But I would think pretty well, the surfaces being solid and smooth.

I read Wonder Junior Deluxe reviews prior to purchase and it looked and worked as expected.
The Wonder Junior Deluxe arrive within the expected time of arrival, packaged well and with all attachments and instructions.
Since the middle of Feb. 2015, I have ground, with the metal grinding wheels: coffee, cranberry beans, corn, and almonds. Rice, with the stone grinding wheels. I'm grain-free and my son is gluten-free, so we will never grind wheat, or other wheat-related grains, and those commercial non-wheat grains, often contaminated by wheat, such as oats and hemp hearts.
I learned that beans, corn, & nuts such as almonds, must first be cracked and reduced to a smaller size by grinding with the (plastic) screw adjustment set for a very coarse grind and run through a couple of times, (this takes a lot of muscle!) or place a dish towel over the very hard foods and use a metal meat tenderizer hammer to crush the foods, or put them in a food processor, then grind with the Wonder Junior Deluxe on finer settings until desired texture (the process takes time, so it's best to be patient.) Rice should be run through on a coarse grind setting adjustment first, then on a fine setting adjustment to desired texture.
It does take quite a bit of muscle to turn the handle, but I knew this ahead of time and it is one of the reasons I decided to purchase the Wonder Junior Deluxe, instead of an exclusively electric grinder. I'm getting older and need the muscle building exercise, besides, my adult son will turn the handle, if I'm not able and it can be set up to run on electricity. Other reasons were that it does not require electricity, so I can use it whenever and wherever I'm able to set it up with a firm and secure base, it grinds both oily seeds and grains, and most of the parts are strong metal or very durable hard plastic.
Make sure both sets of grinding wheels are completely dry after cleaning before the next grind or the results could be a sticky mess. As was forewarned in the reviews, bits of the stone wheel and a tiny bit of paint did flake off during the first and second grinds of rice. In later grinds, it seems to have stopped doing either.
In the future, I plan to grind, with the metal wheels, some dehydrated vegetables and dehydrated fruits, such as bananas and coconut. If it works, then great, I'll have fruit and vegetable flours. If not, then I've learned something new about the Wonder Junior and will keep trying something else.

I first started out with a small $40 hand mill that ground very fine flour but it took me 1.5 hours to grind 6 cups of flour. It was very easy to turn but my arm got tired from the repetition.

Wondermill Jr Deluxe hand grain mill. $219

After using this mill one time I found it to be much faster but much more work to grind the flour. It took 30 minutes to grind 6 cups of flour for the same recipe but arm strength and a very sturdy table are needed. The flour was not quite as fine but worked beautiful for my recipe. In an emergency I have it but for daily use is to much work. It is a great grinder.

Electric wondermill $Free for me $229 on amazon

I received the electric mill as a present for Christmas and I ground up the same flour in 1 minute with out any work besides plugging it in and pouring wheat berries in. Very fine flour and a joy to use. Clean and fast. I should have bought it first and so should you. I will be baking up a storm now. Thank you wondermill. Spend the 10 extra bucks on the electric and keep a JR for emergencies or nut butter.

Both are great products and built like tanks. The electric is no hands down %3000 percent faster and easier.