Works in a pinch but not always very accurate.
340059
Works in a pinch but not always very accurate.  But for the price i can not complain.
3672517
Good for the low price, but not always accurate.  If you're looking for an approximate value of coins in your jar, this is ok.  If you're looking for the exact value, you'll probably need to spend a little more money on a higher quality product.
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.
2945977
I purchased this item to test my home for proper humidity level but when I compared the two I had purchased against a more precise item --a professional unit a friend had-- one read 9 per cent higher and the other 13 percent higher than what I was comparing against.  One unit was precise for the temperature but the other kept changing between the room temperature to 20 degrees higher than the actual reading. Other than the different readings I am getting and its lack of a reset switch this meets my needs.
1104524
Pretty accurate at a decent distance. I bought a 15$ compellor and it wasn't as nearly accurate.
1258898
Feels cheap but works, though dial is a bit off from what the dial settings show.
3447350
Overall, a good device. Sometimes the humidity levels jump around minute to minute so I'm not positive how accurate the measurements truly are. At least it can give you a ballpark estimate.
2346077
Seems accurate on humidity but I think the temperature is a little off.
749707
The range of accuracy is 2-4psi which can be very annoying when setting a tpms light. Mine might be defective, but I would suggest looking other places. This could be a great product if it was a little more accurate. Oh, also the handle to press on to inflate is not the most sturdy feeling. It doesn't glide right when pressing.
4809271
I bought this for use on my boat.  We typically go through a multimeter about ever 2 years but this one has not been working right since the second time I used it.  The problem appears to be in the switch that lets you select which funciton you wish to use because when I push on the center of the switch it will start working again for a couple of measurements but when I move the meter the display goes blank.

When it works it seems quite accurate for such an inexpensive meter but since I cant depend on it I ordered another model from a different manufacturer.
691800
Like many others, I question the accuracy of these monitors.  They read within about 1% and 1degree of one another when installed in the same location, so that's good.  However, I have another inexpensive humidity meter that shows 10-15% discrepancies compared to these.  The temperature portion is accurate to about 3 degrees total, which is acceptable for my use (monitoring reptile enclosures).  I'd like to compare the readings from these meters against some sort of high-accuracy device; if that ever happens, I'll update my review.  In the meantime, four stars total - fairly accurate, fairly easy to read, and the peak tracking is a nice bonus.
4056500
I purchased this item to be able to accurately measure certain items on the golf course.  However, I have found that it is difficult to accurately point to items and get an accurate reading.  Additionally, I have measured certain objects and I get a yardage reading that does not correlate to yardage indicators on the golf course.  Maybe worth purchasing a slightly higher model of this item.
2247501
First couple hundred thousandths are accurate, then the gauge is off inconsistently from about .300" to .800", but it's cheap and works for what im using it for.  I only need ot to measure a couple thousandths for run out, which it does do accurately.

It will be off a couple thousandths at .300", then off more at .400, etc up too .800, but it's not the same amount off as you progressively go up the scale, hence inconsistent differences.
3166223
I am not sure if I got a dud, or if this is just made too cheap. I bought it to test water hardness and it appears to work, however, after getting the initial reading, if you move the tester or just barely tap it, the reading jumps up about 50 ppm or so. So it is virtually impossible to know what the actual correct reading is. That being said, I returned it. I bought some paper testing strips and they were much more accurate imo.
4195845
Takes a very long time to adjust but is nice to have around once you get it to work,and not complertly accurate.
4404538
seems to work good. and accurate. I love the two different ways to measure. There is an issue with the unit staying on and not shutting off. and I don't like that i get a slightly different reading depending on where the object is between the claw. but it wasn't very expensive and it does the trick.
1552431
Better than ph strips but not as accurate as I would have liked.