Just stating what works for me. I have mine on the pillar so it is always in my peripheral vision.

As for them being not worth the trouble. Nice blanket statement with no backing evidence. If you are tapping into the port on the oil filter you are reading the pressure to the engine as it happens. And you are able to see the oil pressure sputter before it goes completely. Way before you do major damage. I have done it. I am actually speaking from experience.

I thought this forum was to help each other out. Advice from people who don't have the gauge and have not used it telling people that it is worthless isn't much help. I have one. I use one. It works. And you don't have to be a race car driver to watch your gauges.