Fine but not for temperature readings.
356078
Did what it was supposed to . No five star as temp sensor was unreliable.
4737360
Instructions are not sufficient to fully know how to read the data as shown on screen.  Works fine for temp/time.
1264065
Started out accurate but, over the past couple of weeks, the temperature readout is approximately 7 degrees too high from actual.  Returning for replacement.
2558130
It is a great thermometer, but it is not instant read. It climbs up which is a little annoying because I purposely bought this thinking it was an instant read.
3598286
Bought two but they read 2 degrees F separately. One was exposed to 38 degrees F but that shouldn't break it...
4307943
I read the reviews before settling on this unit. I knew going in that the humidity should be accurate enough and that the temperate could be accurate enough. The unit indeed seems accurate enough in terms of humidity but is virtually unusable as a thermometer. when compared to a quick read kitchen thermometer, this unit reports around 5 degrees cooler than it actually is. This item is cheap and it's accuracy is a reflection of that.
2686857
The accuracy seems to be fine, however, I wish the face of the display was parallel to the plane of the window. Instead it is tilted about 30 degrees up which can make it difficult to read if you are on the same level as it.
The thermometer swings nearly freely around the suction cup (there is a small protrusion on the cup and a corresponding notch in the thermometer to keep it in place, but this doesn't really work) so I had to fix it with some superglue.
240405
The product description is not make it clear the external sensor only reads temperature. While its good otherwise, the entire reason for my purchase was to measure external humidity so its not useful to me :-/
1068213
This thermometer works fine inside; but falls off if attached on the window outside. So it is disappointing to read outside air temperatures. For reading inside air temperatures it works fine. The numbers and are large and easy to read.
552237
Generally Okay.
Has the temperature high/low memory that we needed, but tends to read about 0.75 to 1.5 degrees F high. This variance seems to fluctuate and become larger as the temperature goes up.
Used to monitor sous vide water temperature for food safety.
4032619
Temperature is not accurate, which was the primary reason I purchased it.  Although it is attractive and the clock works,
2617907
At the price, I can't complain much. But the thermometer is so optimistic as to be useless. Voltage display is accurate to within 0.2V which is fine for the purpose. If you really want an indoor temperature reading for your car, this is a no-go.
4977800
I purchase two of these and layed them side by side in a freezer overnight, There was a 5 degree difference in the readings. I wish there was an adjustment available to set to correct reading.
2722838
I'm using these on my 2 gallon Yorkshire glass jug w/spigot for Kombucha brewing.
I found that these overkill here in Los Angeles where the weather is 80 degrees plus.

I rated 3 stars since the temperature is not easily readable without squinting or using a flashlight.
2374360
I guess I didn't listen to them as this doesn't seem to be of use in measuring body temperature well. That's what I wanted it for so it's not of much use to me. It's very well made and works fine. It's just finding a use for it. At the price I decided to keep it for use with the oven etc.
3578450
Item worked well.  Used for relative temperature measurement.  Not as good for absolute readings.
2730165
Fun to play with and seems to work well in situations such as an indoor room, but I got wildly inaccurate readings when taken outside on a hot summer day (following recommendations by weather professionals such as a shaded louvered box, etc.)  There is a calibration feature, but it is limited to +/- 8 degrees.  Not very helpful when