Yes. Especially for chicken breasts. It’s easy enough to know for sure they’re done, but they’re much easier to eat as soon as they hit 155F. My immune system has never questioned my chicken, but my taste buds are very thankful for the meat thermometer.
I always heard 165 too, but I looked at the chart on the meat thermometer and it said 155 for breast. I tried it out and it’s much juicer.