Good

When installed properly, it works great. Just bought the bike and needed to break it in. Knowing what my RPM is, helps with the break in period.

Worked well, the installation suggestions had to be mined from the internet.

I installed this tach at the same time I was installing the temp guage. The included 3 option template made drilling the holes easily and great instructions for hooking to the coil wire. I actually think it reads RPM rather quickly

It works. But would be nice if you could change the battery. Hopefully it lasts for several years.