Overall, you get what you pay for with this caliper. I regularly use 8" mitutoyo calipers, but wanted something shorter that I was OK banging around for general purpose use, and this is a lot of value for the money. I've been using it every few days for 2 months, and feel qualified to write an honest review.

First the good:
+It's fairly inexpensive, so you won't feel too bad if you drop it.
+It is pretty accurate (more about that later). It is accurate to the .001" tolerance specification in the certificate of calibration.
+Overall, it's well built.
+The back of the caliper has a fraction to decimal chart.
+ there is good contrast on the LCD display
+I've left the caliper "on" for long periods of time and the battery does not drain fast.
+The case looks different than the picture, but allows for a cutout for a base that turns this into a depth caliper as well.

Now the not as good:
+The locking screw on the slide is not retained, so it's just a matter of time before it disappears without a trace. Some of my other calipers have a retaining ring so this does not happen.
+The feel of the sliding is a little more slip-stick than smooth, though I have cleaned it several times.
+ The directions and certificate of calibration are a little laughable... they include grammatical errors, and don't inspire confidence.
+I would have preferred a clear case so I could tell at a glance if the instrument was inside or not.
+As one other reviewer also found, there may be burrs on the jaws that need to be removed. I went through mine very carefully to explore why all my measurements were .001-.0035" off my expectations, and found that there was a tiny burr on the jaws that prevented it from closing all the way. I needed to very carefully deburr the edges and then used a superfine Arkansas slip stone to lightly go over the corners and faces of the inside jaw. This helped: the reading no longer wandered a bit when the jaws were pushed closed to .0000. I also verified with a light behind teh jaws that it was closed and no light was seeping through anywhere. I then checked measurements at 1.0000, 2.0000, and 3.0000" with a set of calibrated Mitutoyo carbide standards. And I then checked some random lengths with a Fowler (economy) Gage Block set (all at 70 degrees F). The results usually got me to within .0005" of the expected measurement, sometimes within .0015. This is, as stated in the certification, within tolerance, though there was a little more variability than I expected.

Overall, this is good for the money. I also recommend the base that screws on and makes it a quick depth micrometer/caliper.

I can measure everything - ID, OD, depth.

I bought these in 2015 and they're still going strong 8 years later. I needed the large 12" capability for a project I was doing and didn't want to drop $300 on a Mitutoyo or Starrett just to use once. To my surprise, for the money, they're really nice calipers with smooth action and good precision and accuracy. Way better than you'd find at HF. Twice the price compared to those, but about a quarter the price of the primo stuff, so still a great value, and you're legitimately getting a good tool here for that money. I find myself using them more than I thought I would so it's great that they turned out to be a quality tool.

One complaint I do have is that they don't auto shut off so they will use up batteries quick if you don't pay attention to that.

I have purchased a few of these for my company and they are far better than the cheap alternatives. These are very close in performance to the very well known name brand. I recommend these, you wont be disappointed.

Even though I just getting started in machining, I have a long history with metrology. I got these out of a desire to move to the digital age. LOL I have several pairs of calipers, from multiple brands. I have 3 Vernier calipers (1 Mitutoyo, 1 Aerospace, and 1 Mauser), 2 Dial Calipers (1 Aerospace and 1 Mitutoyo) and a couple of randoms in metric.

First Impression and build quality: The first thing that strikes me is the gravity in this ting. You pick it up and you are holding a tool with heft. In my mind, that's a good thing. I have have held (and used) cheap, poorly made digital calipers. These aren't them. By a long shot. These feel good in the hand. The display is large and clear enough to read easily. Something that my failing eyes really appreciate. The edges along the scale are broken so it doesn't feel like you are going to get cut. My tastes would have like a tiny bit more, but if you want or need that kind of feel, there are "better' ones on the market where you pay for that sort of thing.

Accuracy: Good enough for the girls I go out with. I measured them against a set of feeler gages, gage blocks and 1" through 5" standards. Without fail they measured dead nuts on, and always returned to zero. I was very impressed, as I figured I would eventually get a reading that was .0005" off at some point. Nope. The jaws are very precisely ground and I could find no passage of light between them along the entire length when they are closed. Remember, calipers are machinists approximators, if you have something that is critical, you need to mic it.

Final thoughts: They aren't Mitutoyo's or Starrett's. If you want those, then spend 3x the price. You will get a somewhat nicer feeling tool but I don't think you will find anything more accurate though. I decided to save the difference and buy more tools to add to my collection.

As a PS to iGaging and to other manufacturers. how about a led back lit LCD display with a rechargeable battery? That IMHO would be a nice upgrade for ageing eyes and would eliminate having to have the right battery on hand when it needs replacing.