very usefull when you want to keep an eye on your rig while away from it, you can even restart it, overclock, undervolt, check temps, and musch more while using the free edition. Honestly, i couldn't ask of anything more (except for a few things, but they are covered by the paid version)

Minerstat, especially with their OS helped me manage my rigs easier and remotely. The paid version with alarms, triggers and Telegram bot is worth the price! Come on, if you're mining it pays itself, since it saves you from errors and downtime.

I stuck with windows (still using minerstat) for waaay too long - now i'm on MSOS and my rigs have been 100% up for over 3 weeks now
so easy to use, so easy to switch coins
the Discord is also great and the Minerstat folks are great at getting back to you quickly
software usually drives me mad but i am continually surprised and impressed by minerstat
deserves 10 stars!