I got a cheap ultrasonic-type humidifier recently and it was a huge mistake. The water particulates killed one of my houseplants and put two more on life support.
I definitely felt more comfortable with it around but I'm gonna have to get a different type next winter.
It's 100% worth it! I got a delonghi Tbf I've only had it since December so I can't comment on longevity, but clothes dry far faster and I don't have manky black bits on the kitchen wall.