Good quality for an inexpensive tool. The connector feels heavy-duty. I have been having Check Engine light events on my van since last winter (whenever cold and wet weather arrives), so I bought this OBD2 scanner to read the code and determine the severity of the issue(s). The scanner connected (ie. linked up) with the onboard computer fairly quick. I was able to read the code, extracted the Freeze Frame data (sensor readings when the code was triggered), and erased the code. The Check Engine light is now out, ready for the next triggering event! I only used the scanner once, hopefully it will connect without issues the next time. We will see.
The user's guide needs to be downloaded by QR code or going directly to the manufacturer's website. It is a good idea to read the user's guide before attempting to use the scanner.
PS: The scanner powers up when you plug it to your vehicle, and you can change settings such as language and contrast. To actually get the scanner to communicate with the vehicle's computer, you need to turn the ignition to the ON position. Only after that, you can scan for fault codes and other information. I am wondering if some of the people who said they could not link with the vehicle or persistently getting "communication error", just simply did not turn ON the ignition (like it says to do so in the user's guide!)