Welcome to the forum! That's a beautiful coach you've got.
If you use our search function and type "TPMS" or "Tire Pressure Monitoring Systems" you'll find a week's worth of reading material.
My take away from most of that is that YES it's good to have one... No it doesn't replace regular inspections of your coach including your tires...and brands are a personal choice. We have had the Doran 360 for two years now and I would recommend that you look for something else. I've now had four sensors fail so you have to be able to do better than that