They make noise
If you are hypersensitive to electronic sounds like I am, I wouldn't recommend these. Absolutely annoying when you're in a silent room and hear "eeeeeee" while it's running. However these things are easy, love that they're chargeable. If you have a plant that needs a little extra love while you're not around, it's great. I noticed the black and white ones run for different amounts of time though? For a cheap and easy plant product it's way better than a bulky humidifier.
Rating: 3 stars