Anyone using a wearable hydration monitor?

Hydration tracking seems to be gaining popularity, especially with the growth of wearable tech. A lot of people are considering wearable hydration monitors to help manage their fluid intake, but is the investment really worth it? Some devices advertise accurate readings and reminders, but do they actually perform as promised?

For those who have tried one, what has your experience been like? Did it make a difference in your hydration habits? What key features should I look for in a quality hydration monitor? Also, do you have any specific brands or models that you would recommend?