Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A very useful tool, but it could be better

I have used this scanner on several OBDII vehicles from various manufacturers, and it has been a valuable diagnostic tool. I was able to pinpoint some emissions and drivability problems on several cars. The included software is a definite troubleshooting resource, and operating interface is easy to understand. That being said, the only difficulty I had with the scanner is the absence of a backlight for the digital display. This makes the scanner hard to read in either low light or high-glare conditions. It is a bit annoying, but the other attributes more than make up for it. I am more than happy to use it when troubleshooting.