Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: What makes this a burr mill grinder?
Document: I recently purchased a MR. Coffee BVMC-BMH23 Automatic Burr Mill Grinder. This is a Great little grinder for the money. It Does a good job grinding the coffee beans, which makes for a great cup of fresh coffe at the home level. Although alittle of the coffee sticks to the upper plastic top due to static electricity, afew taps on the top before opening the bin will help reduce any mess. all in all great purchase!
This Mr. Coffee burr mill grinds coffee very uniformly and quickly. The coffee makes a good, strong brew, which is what I prefer. The grinding burrs are ceramic, not plastic as some reviewers have stated. compared to our last grinder, which sounded like an air raid siren, this machine is quite quiet. I have solved the bright blue light issue some have complained about. I simply do not push the cup all the way in the machine until I am ready to grind.
Terrific purchase. Have already use many times. Makes great coffee beans. I tell everbody about Mr. Coffee Mill Grinder. Thank You Very Much, Mark
I have been using this mill for about 6 months. It's loud and leaves a lot of coffee dust. I have to wash the receiver part out every other time I use it. It has 12 settings for the amount of coffer grounds you want and shuts off automaticly. Goes from fine grind to large grind which I like. I gave the mill 4 stars because of the noise it makes when grinding. But for a bargin hunter like me this does the job.
Life's a grind. Now, so is my coffee! A burr grinder makes all the difference in the world. I've stepped off the ledge of morning semi-consciousness and embraced the enlightenment of caffeinated Nirvana.
**********I've been searching for the Holy Grail of cheap burr grinders. This is not it, but the price tag makes it worth a look.Top to bottom, this is a good looking grinder that is not so obscenely huge a kitchen renovation is required to make it fit. It is mostly plastic, including the clear hopper on top and the clear basket below.
I love this grinder. It's my first burr, so there might be better out there but I haven't had any issues. I've only used it for coarse grounds for a French press, and while there is some dust that comes out while grinding, it tends to sick to the side of the container that holds the grounds. As long as I'm gentle with pouring the grounds, the dust never makes it into my press. I definitely recommend this burr if you're on a budget. :)
Got this because I was sick of having coffee grounds that tasted old when I occasionally made coffee. Chose a burr grinder because I've never liked blade grinders, and was hoping for a more even grind.Being this is our first burr grinder, we're happy with it. It's wonderful to have freshly ground coffee, and this machine is a cinch with the hopper and the automated measures. The cup markings they use are pretty accurate for the cups that our machine makes (i.e.
This burr grinder makes better tasting coffee. Look at the grinder @ Starbucks - it's a burr grinder. Coffee tastes much smoother and you use can less coffee, because the grind is better. The grind adjustment lets you grind from very course to expresso (very fine). It also has a setting so you can grind the exact amount of beans you need for the number of cups you are brewing. This grinder is built solid, well engineered, looks good and works well.
Love this thing, but the plastic container holds a static charge that makes a mild mess to clean up. There is some powder even on large grind settings, but that's normal for a machine. You can't get much of a better burr grinder for this price range; I bought this after my friends swore by it.The bright blue light can be mildly annoying, particularly if you have an open plan kitchen area; however for all the whining, the issue is easily resolved with a tiny piece of electrical tape.
Answer: A chopper uses a revolving blade to slice the bean (imagine a knife).  A burr mill passes the bean between two revolving abrasive wheels (imagine a sander).  With a chopper, the courseness of the grind depends on the number of times the blade passes through the bean.  With a burr mill, the courseness of the grind depends on the size of the gap, or distance, between the two grinders.  The wider the gap, the courser the grind.  With a burr mill, the courseness of the grind can be set much more accurately.  However, with something as moist and sticky as a fresh coffee bean, that gap will become clogged very easily (picture a backed up drain).  The problem with the Mr. Coffee, and probably all burr mill coffee grinders costing less than several hundred dollars, is the users inability to clean the grinders properly.  This can only be done properly by dismantling the device, cleaning it thoroughly, and then reassembling it again.  I should have known better than to buy this ridiculously designed piece of @#$%!