Bought a Weber EX6 and it just looked "incomplete" without a mechanical gauge on its lid.
This was a great purchase and made the cooker look great!!
And it is an excellent way to know another temp value inside the can. I have two other internal probes but the Weber is intentionally multi zonal so this one is right in the middle at upper rack level so I can have confidence my cook temp for smoking briskets is where I want it.