Inconsistent results.
597880
I haven't had luck with this fillament. The prints come out brittle and the quality of the final product is hit and miss. Even when printing the same object with the same settings. I can't blame the machine because the prints come out great using Hatchbox or Protopasta. For the price, I would definitely buy Hatchbox fillament.
4258662
Inconsistent readings - test a battery once, then re-test seconds later and it reads a completely different result. Maybe I got a bad one, but I am not impressed regardless. Spend your money on a simple hydrometer instead.
1156814
I am not happy with the product. it gives me inconsistent result. Just too lazy to return it back. I am not blaming the brand, may be just my piece is defected.
2266537
These work fine, but some of them don't seem to work like others. Their quality control seems to be lacking quite a bit.
3065621
There were a handful of error in the ways certain formulas were written up. Also, some of the solutions were for values different for the ones listed in the problem. I'm going to try the Mometrix study guide next time around.
1964247
Someone else had the same problem - this was consistently inconsistent.

It would regularly (but not always) add ~5-55 mm to a reading, and I would have to re-zero it. Worse, this could happen multiple times in a row. Very frustrating, and not worth the hassle.
2815090
This works correctly only half of the time. It claims to search for available open channels and I've followed the included directions but the iclever won't leave 107.9fm. I often get bad interference when there is a local station broadcasting with that station number as a result. The microphone only works properly 1/4 of the time. I'm constantly having to take my phone off bluetooth so I can take the call the old fashioned way because whoever I'm speaking with usually complains that they can't here me well or at all. Other times it works perfectly. The inconsistency is the most frustrating part of it. I see others have posted mostly positive reviews so maybe my unit is defective??? Buyer beware!
12641
I used this thermometer and after 2nd use, one of the probes started showing inconsistent results.  Sometimes it would show accurate temperature, and other times it would 20-40 degrees off.  After few more uses, the temperature would be consistently off, by a significant amount (see image attached, both probes are in the same location and show different temperature).  The other probe seems to work pretty well and is accurate.  Not sure how long it will last.  Other than this (pretty big deal) everything else seems to work fine.
2401330
Returned. It works, the amount of food seems consistent, it's just completely inaccurate. We feed our cat small portions multiple times throughout the day; with this product we would have to feed the cat once or twice at most. Our cat food is Royal Canin Adult HP, small pieces, http://amzn.to/2bJDFnD and, even on the smallest 1/8 cup setting, it always output 1/4 cup amounts. If there were an option to block half the section on the conveyor belt, or get a different belt, or a 1/16 portion size (meaning 1/8 portion...), or it were accurate with this food, it would have worked out. We filled it up and set up the schedule and prepared the conveyor then let it dump on its own into many small bowls to test it out. After 3 portions, it was apparent that it didn't dispense the correct amount--all were twice the desired and configured amount. After a dozen or so we decided that it was consistent (consistently wrong, though). We didn't own it long enough to comment on timing or reliability, it worked fine in those respects for the first day or so. I would give it 2 stars but the amount was at least consistent, just inaccurate wrong for our cat. Every feeder we've tried has been inconsistent.
4916088
The concept is good, but it has proven to be somewhat inconsistent.  They don't work to the ranges they claim.  Within the range sometimes they work and other times nothing happens.  I bought the receiver/repeater to try to remedy the consistency.  It didn't make much of an improvement.
3864263
I've bought this stuff on here 5 times.  Each time I get a different consistency in the bottle.  I definitely agree with some of the other reviewers that it looks like someone is watering these down.  Results on my face have been inconsistent as well.  Going to try something else.
4693274
Easy but inconsistent.  I have 3 of these. I lined up together.  They are a few degrees off.
4693977
These seem to be hit and miss. Most work great, but once in a while you get one with range issues.
2455755
All aspects of the product are acceptable except that accurate distance measurement is inconsistent and unreliable for use in close tolerance tight spots.
1630069
It sometimes works and sometimes does not depending on the relative humidity and working temperature. Its not that expensive so you can give it a shot but don't expect to get consistent results.
2412192
Once I finally received it.  I really do not have the same results that I expected.
544739
Different water temperature = Different results
Useless