I give this transmission shift solenoid kit 4 out of 5 stars. The solenoids fit my 4L80E transmission properly and installed without any issues. After replacing the old parts, shifting became much smoother and more consistent. The quality seems good, and everything worked as expected. The only reason I'm giving it four stars instead of five is that I would have liked more detailed installation instructions. Overall, it's a solid replacement kit and a good value.