I like my simple Vicks warm air humidifier the best (with only a off/on switch and low/high setting) bought at the local target/Walmart. Mine is running on 5+ years. I’ve bought fancier machines (ultrasonic, automatic shutoff at set humidity levels)but I don’t feel symptoms wise better in the morning. I like the warm air over cold air or ultrasonic personally in terms of how it helps my sinusitis.

Vicks Warm Moisture Humidifier, V750 https://www.walmart.com/ip/29765912

I have chronic sinusitis so I run a humidifier 4-6 months a year.