GOOD BIG DISPLAY: I have Vodlbov calipers for the big display and it is. Easy to read. NO BACKLIGHT: However, the display is not backlit. This is a very useful feature that this device does not have. SMOOTH SLIDE: The movement is smooth when you slide the caliper. Other calipers I've used had a very rough, almost unfinished edge, but Vodlbov's are very smooth and glide well. NO Fractions: The website talks a lot about woodworking, but calipers don't measure fractions, only imperial units in decimals. and metric. EXPENSIVE: Similar products appear to be more expensive, probably in the top 10% of prices. WITHOUT BATTERY INSTALLED: It comes with a battery that needs to be installed. WITHOUT BATTERY POLARITY: What is particularly annoying is that they do not recognize the polarity of the battery installation. For reference, the "+" or positive side is mounted facing up or in the same orientation as the display.