I've owned several cheap multimeters over the years. Craftsman, RadioShack, and a Sinometer to name 3 more recent ones. All failed to compare to this, even though the Sinometer and Craftsman (was a gift) were more expensive. To compare :* The craftsman was decent - but it kept blowing fuses, didnt have auto-ranging, was bulky, didn't include side holsters for the probes like this, and eventually I cracked the lcd screen from dropping it (could still read off it). Measuring AC voltage with this one it's generally within 0.05v the same.* The RadioShack had a horrible shell, no auto-range, button cell batteries, had no amperage measure features, and was usually off 1+VAC or 1% of the Craftsman. Never could rely on that.* The Sinometer was decent at first but I had issues with the auto-ranging. It kept jumping around when measuring stable voltage. It was usually within 0.1vac of the Craftsman.* My Killowatt also measures VAC - and it is off about 0.5v from the Craftsman and this (reads low). Pretty sure the Killowatt is just incorrect, I've never had anything read as low as it for VAC.* Lacrosse AA/AAA battery charger measuring voltage of batteries - the readings are always within .01vdc the same.* The final comparison is with my Velleman oscilloscope: I tend to think this is the most accurate voltage measuring device I have and a good benchmark for VDC. This unit is usually within 10mV of that measuring sub 12v sources.So you can see everything has a bit different readings, there are few things I trust when I need to get an absolute accurate reading. Now the list includes this, the velleman, and probably any fluke.Besides accuracy and comparison other features of this :* Hard rubber corners to survive a drop in just about any direction.* Side holsters for probes* 10A DC and 200mA AC mode* 1.5v 6v 9v 12v battery tester mode* Auto-ranging - if you don't have a meter with this feature it's really convenient* Continuity testing mode* Ohm resistance measuring* Auto off if left onI don't have a fluke to compare the readings too - but I have previously with my oscilloscope and it was as close to a reading as this was. If I used a multimeter all day for my job - then I'd probably invest in a 75-250$ meter like fluke. However for 15$ this unit definitely blew me away. You can't go wrong with quality and accuracy at this price.