Review (4/5): Tricky at first
So, you have to long press to turn on and off this unit. I end up changing the settings all the time instead of shutting it off. They settings are weird, or my mouth is weird because they all pretty much tickle the inside of my mouth. I know it's odd and sounds funny but I'm super ticklish. I guess it doesn't much matter where. I use it on the milder setting and hope for the best.
This is very lightweight and the battery lasts for a good amount of time. I just wish it was a little less aggressive in there. ha!