I had the previous Smart Grinder which worked very well but difficult to dial ...
358179
I had the previous Smart Grinder which worked very well but difficult to dial in the grind for different bean. This updated Pro model is much better at giving a lot of adjustment for precise grind size and length of grind to 0.2 seconds. Every espresso dose is repeatable! The only negative is the old machine seemed to have a little better grind size uniformity.  I grind almost exclusively for an espresso machine and the coffee particles from this grinder always includes extremely fine particles that pass through the portafilter holes.
3555625
I've had this burr grinder for years and like it much better than my previous grinder.

Cons:
It is difficult to clean.  I've spent hours digging old grinds out of the mechanisms.  It cannot be taken apart to clean the burr.
It is loud.
The 'timer' is not accurate for coffee measure.
The high speed of the grinder can heat the oils in the beans and leave a burnt or bitter taste.

My next grinder will be a high quality (ceramic) manual grinder.
4106500
My wife had a Krups grinder; which for years she had to push down on the top while grinding because the sensor wasn't very good.  Common problem.  This one; looks snazzier and has NO issues with it always knowing when it's closed and ready.
Grinds well for a coffee-press (which is what she likes).  Burr Mills are not good for the fine grind needed for cappuccino; but if you are aware of that limitation, this is a great machine.
2536647
I have not had good luck with this grinder.  My husband is handy and within the first year he has replaced a part that keeps it grinding correctly (almost part of the gear, it is plastic) 4 times in one year.  Yes, the company has been great to send multiple of that part that needs replacing- but the point is - if he weren't so handy, I would be out of a coffee bean grinder.
I would not buy this unit again. I am sad, because I was specifically looking for a burr grinder with a slightly bigger hopper.
4270158
I changed rating after quick and helpful reply from Eukein. I was able to fill easier with hands cupped over the opening and regulate the grind by turning winged nut at bottom and  keep it at least 80% full for optimal grind performance. Could not give 5 stars as batteries are awkward to load and for best performance you need to keep near full.
310657
The grinder is excellent and very consistent. The suport holder/fork is too long for many portafilters and cannot be adjusted sufficiently to fit.  That is annoying as the main reason I purchased this particular grinder was for its dosing feature. I contacted the US representative who told me that they were going to produce another fork which I could "purchase." I cut off the top of the fork and it more or less holds the portafilter.
2225417
I like this grinder, but but have some qualms with it. First I will mention what I like about it:

Finish:
I really like the finish; the top print is beautiful, and the grey finish throughout is very nice and it arrived with no scratches.
The middle and bottom chambers have a large capacity for a grinder of this size, which is related to one of the "cons" below. The design on the top is in the form of a decal (expected at this price level).

Action / Use:

Action on this grinder is excellent! Unlike some other grinders the machining provides sufficient clearance that it doesn't need a nylon bushing to maintain clearance between the teeth; in fact it doesn't even come with a bushing/washer!  It glides very smoothly, and it shreds herbs very well. There is some fine knurling on both the top and bottom chambers to assist with grip, which is a nice touch, and the magnet holds the lid on surprisingly well.  It does a great job grinding the herb, although there is a flaw... see below.

The threads engage smoothly with no problems, with no tendency to cross-thread, nor is there any feeling of "galling" that you encounter with poorly-machined threads. The case is slightly taller than some other same-diameter 4-piece grinders, but it is not heavier and it has a larger capacity so that's a win.

Cons:

First, the holes in the top chamber between the grinding chamber and the herb chamber could stand to be a little smaller. I had ordered this particular grinder for its greater number of teeth, thinking it would work as a finishing grinder.  It does grind very well, but the holes between the grinding and middle chamber could stand to be smaller; to grind herb really fine you need to turn the grinder upside down to keep the herb from falling into the chamber, and grind away with the grinder upside down. It does work well but it is a minor annoyance; I had expected that with a large number of grinding teeth that the holes would be a bit smaller to retain the herb until it is finely ground. This does bother me but the workaround is something I'm used to with other grinders (including space case), so it's no big deal. I would like to see them address this though, and I feel compelled to dock a star over this oversight between this and the too-fine screen issue. :(

Pollen screen: the screen on this grinder is far too fine. Of course I put a nickle in the herb chamber to help shake pollen through the screen, but it could stand to be a bit more coarse. I forsee having to clean the screen more often than I would have to with other grinders.

Lastly, and this is related to the large capacity; the metal is a much thinner gauge than you might expect. This does not negatively impact its function in any way, but when you pick it up and open it, it "sounds" cheap, not entirely unlike sounds you hear from a cheap early 1980s econobox.  This does lend to a larger capacity in both the pollen and herb chambers, so it's simultaneously an advantage as well, but if a superficial cheap "feel" matters to you, you might find this bothersome. I find the light weight and increased capacity to be advantages which outweigh a superficial quibble. I'm not docking any stars for this one as this is a purely subjective issue and frankly it doesn't bother me but I felt it worth mentioning to help those who do care about that sort of thing.

Conclusion:

It grinds well, which is what is important, and can be used as a finishing grinder if you hold it upside down to grind the herb longer, and is very good for the price.  The holes between the grinder and herb chamber could stand to be made smaller, and the pollen screen could stand to be more coarse, but for the price... it's quite good. I would not hesitate to buy another if I needed another one.
1579957
I think I'm one of the few that did not like this grinder.  It worked well at first, but now the pepper is always stuck in the grind mechanism. I can get it to work a few turns if I bang it hard on the counter.  After 2 or 3 turns though, it goes back to not dispensing much more than a grain or two. It will dispense more if I turn the dial up to the most coarse, but I don't like huge chunks of pepper on my food. Most everything else I've purchased from the OXO brand has been great- this is the only exception.  I ordered a different brand today, and throwing this one out when it arrives.
3865641
This grinder was very well made and seemed to work well. That said, I returned it and exchanged for a Hitachi GS12SR3. I did not care for the balance of the Porter Cable, and the length of the unit. I wanted a unit That could be used at times one handed and was leary of being able to do that with the PC.  The Hitachi is very well balanced and I have no problems and Hitachi is an excellent brand and having a Belt Sander, Circular Saw, and Drill by them and all being well made and lasting longgivity, I should have gone with Hitachi originally.
1924492
--and I've used a LOT of grinders. VERY badly designed, and the "custom" thing is a gimmick and a sham: it's a standard rotary grinder. They just added flashing lights and extra buttons, and made it look bulkier. Every day was a misery dealing with this thing: it's designed so that you have no choice but to spill grinds all over the place when you use it.
2805268
I like this coffee grinder; however, the basin inside isn't as large as I would have liked.  When we have company, I like to make a larger pot of coffee.  This grinder will take two rounds of grinding to make that pot versus my old grinder (which died) that only needed one round.  Other than that one issue, I do like the fact that it is relatively quiet while grinding.

Note:  If you want your coffee ground fine, you will need to move and shake the grinder while grinding.  Otherwise, you'll find some leftover chunks of coffee bean in the basin.  My old grinder didn't have this problem.
1985894
Sturdy grinder with a few issues with the grind size dial.  I don't have an issue in that I always grind on the same setting, but switching between grinds can be difficult - the dial sticks.  Other than that, the grinder works well, is easy to maintain, and so far has stood up to frequent use.
1214869
I had a set of Olde Thompson electric grinders that I purchased probably 10 years ago at Costco.  The ones I have seen more recently have been plastic and junky but mine needed replacing badly.  I had a really hard time choosing and I only replaced the pepper (which had taken one spill too many) - this is nicely weighted, and the adjustments are fine for us (we don't go for superfine pepper so I can't speak to that but the range of adjustments appears ok).  It does seem slower than my last pepper grinder but I don't think that will be an issue for us.
Update: The bottom black plastic cracked on one side (I think the torque of the grinding is too strong for thin plastic) which causes all the pepper flakes to be huge.  It is a nice pepper grinder other than that - if they had just put a stronger part in there - we would still be happy with it.  I am going to contact Prodyne but if the piece is not replaceable (and if it is I hope they have a stronger part) - we are going to be looking for a new pepper mill.
939077
Great grinder. I figured out the best way to use it is to line up the grinder lid with where the cord comes out so as not to overlap the switch guide. Otherwise, I was having to repeatedly try to position the grinding cover so it would work. Once I got past that, I have loved this grinder.
1238426
The grinder is great.  The only part I do not particularly care for are the grind settings.  It is hard to turn to the proper setting- you have to turn the dial a certain way at the beginning, when you miss your setting, you have to turn the dial the opposite way, you simply can not turn it backwards.  You also have to put in some elbow grease when you turn the dial.  Other than that it is a nice grinder.
3655577
We've tried twice. Both times the grinder quits. It's electric so if the problem is motor you can't fix it. Probably better to buy the burr grinder separately. By the way, I have bought several burr grinders and they work perfectly. This combo is a mess!!
3609125
it is still hard for me to grind with my arthritis hands, but I can hook my thumb on the handle and it is easier than our old grinder was to use