Biggest downside is the field environments you can find yourself in. Depending on your industry you can be in some horribly smelly/disgusting facilities or dangling off catwalk way above ground trying to adjust calibration on some silly sensor. There's good ones though too.
I'm a Software Eng in the industry so I don't ever really have much for field duty, but I work with several coworkers who are able to get their hands dirty when we're doing a site install: wiring panels, tracing faults, installing/adjusting sensors.
But talking about pay scale is a bit iffy based on where you're at now. I don't make FAANG wages doing what I do, but I do make somewhere in the 80th+ percentile for my geographical location (Saskatchewan) so its all relative