FALSE ADVERTISING: SCREEN TOO DARK TO READ
931772
FALSE ADVERTISING!!  It does what promises, I guess, but the screen is  so dark it is nearly impossible to read.  Backlit at night is barely OK; daytime no good at all.  The picture you see on the screen with the bright white lighted "168" is fake.
3557990
One cannot adjust the screen lighting on this unit and the screen is rather dark.  Yes, it is a good price and works well....however, the absence of lighting requires that you get a cover with a light.  In retrospect, I recommend paying a little more and purchasing the backlit kindle.  If the lighting thing doesn't bother you it is a good purchase
3571780
Very hard to see, the colors are not dark enough to view
3674091
cannot see caps lock light or when dark the keyboard lights hardly shown. stick with the clear options such as green or totally clear
2400577
Thick screen protector privacy screen only works with lowest brightness in the right lighting. Pretty disappointed I paid $20 for a falsely advertised product. Clearly 90% of these comments are fake.
1059530
Too dark to read LED in daylight. Tiny. Entire sheet fit in standard post envelope.
2321835
The LCD display is very hard to see because all segments are lit all the time. The segments I am supposed to see are lit up a little more darker. I am thinking the particular unit I received may be defective.
3937804
The Kindle version of this book displays all text blocks with a white background (I use Kindle for PC).  If you prefer a white-text-on-black-background, such as for reading in low-light situations, you will not be able to read the text.  I find this limitation unusable.
1944287
HP 10s+ Scientific Calculator  has a very dark screen. Hard to read in lit room flat on desk. Calculation options performed as expected.
1961614
The description of unit is misleading, it doesn't come with a screen so you have to buy a S D READER and has a night flash not what I wanted very disappointed
2094622
#1. the screen is too dark and there is not a user friendly way to lighten the display
2. I did not buy this to receive advertisements or be bombarded by marketing gimmiks,
4036506
description didn't say black and white only.  So it can be used only for reading, not for games. I returned all components today, two business days after receipt.  I will order another Fire when I get all my money back (about $367).
1796013
The LCD must have poor contacts or something. Enough of the lines don't darken on the bottom half of the screen that I have no idea about any of the temperature data.
3686967
The features on this would be great if the screen images were actually as sharp and crisp as seen in the advertized pic. It is so difficult to see the screen whether by day or night that I am wary about having my daughter continue to use it. Someone should have thought about a backlight for this screen to help with visibility. Her father was so excited about this purchase and became so angry when he realized he couldn't see the screen himself.
176372
It is had to see in low light.  I was hoping for red numerals, got black.  Will make sure display is red from now on.
882549
The screen can not be seen in any kind of light, forget about outside in daylight.
I can barely see it in a dark room.

If you can deal with that it has worked ok, decent battery life, and I have not broke it yet.
1473570
Screen is really blurr. Not good view at night.